J code 302? [Archive] - DFWstangs Forums

: J code 302?


To Many Mustangs
01-27-2007, 03:00 PM
I recently bought a 302 long block with less that 20,000 origional miles on it. It came out of 1968 Cougar with a "J" for the engine code.

I am told this is something very special, something to do with the heads, but I am unclear as to what I'm dealing with. I hate to rebuild it with some ordinary kit if it's special.

Any Input or advice on where to find it?

cool cat
01-27-2007, 04:55 PM
They aren't that special. It's just a low output 4v 302, somewhere around 225 hp (gross). The came with the same tiny valves and port sizes as a 2v 302. Hope you didn't pay much. The boss 302 is the only special 302 Ford built.

8mpg
01-27-2007, 05:07 PM
They aren't that special. It's just a low output 4v 302, somewhere around 225 hp (gross). The came with the same tiny valves and port sizes as a 2v 302. Hope you didn't pay much. The boss 302 is the only special 302 Ford built.

lmao..but true

To Many Mustangs
01-27-2007, 09:43 PM
I paid $200 for the long block motor. I plan to set it back up and sell it anyway.
To bad about the J code thing :-(

I have an 4V intake with a #4100 Ford carb from an older Mustang project that I think will bolt up to it. That seems like it will be good for 225ish horse power...more than adequate for someone building a classic commuter I figure.

Thanks for the ifo guys. I appreciate all the help.

8mpg
01-29-2007, 08:59 AM
I paid $200 for the long block motor. I plan to set it back up and sell it anyway.
To bad about the J code thing :-(

I have an 4V intake with a #4100 Ford carb from an older Mustang project that I think will bolt up to it. That seems like it will be good for 225ish horse power...more than adequate for someone building a classic commuter I figure.

Thanks for the ifo guys. I appreciate all the help.

how much you wanting for the motor and carb?? My dad has a 68 j code fastback... he might want to go back origional

To Many Mustangs
01-29-2007, 03:23 PM
Sorry so long responding. I was out for the day.

last night I took the motor apart completely to get it ready to run to PM for machining. As of right now, it will need to be bored a little to get past some rust in the 5 and 7 cylinders. I think .040 will be all it needs. The heads need a rebuild of course and look like they are actually .62cc heads. Let me make sure about that first. Apparently there are both 55cc and 62cc heads in the 4in x3in 302 set up. It makes no difference to me since all I was looking for was a good little 302 or 289 for my Mustang project.

So, I can box it all up for you as-is for $300 with the intake & carb. I think that's a solid deal. It's on the classified section for $400 but you gave me solid advice all last week so it's the least I could do :-)

Shannon
817-505-8673

Maverick
01-30-2007, 03:39 PM
They aren't that special. It's just a low output 4v 302, somewhere around 225 hp (gross). The came with the same tiny valves and port sizes as a 2v 302. Hope you didn't pay much. The boss 302 is the only special 302 Ford built.


Oh really? A J-coded 302, with 10.5 to 1 compression pistons, factory 4 barrel, the very basis for the 1968 Shelby GT350 (with or without Paxton supercharger), then was used in Trans-Am racing (the basis for the Tunnelport 302, and later 1969/1970 Boss 302) isn't special???:rolleyes:

Maverick
01-30-2007, 03:43 PM
$300 with the intake & carb. I think that's a solid deal. It's on the classified section for $400 but you gave me solid advice all last week so it's the least I could do :-)

Shannon
817-505-8673


Thats a good deal for a matching numbers engine...good luck with the sale

To Many Mustangs
01-31-2007, 12:19 AM
I am new to this forum thing so forgive me if I am being foolish or downright ignorant. The motor is or isn't anything worth taking notice of? Someone tell me straight.

I've never run into a "j" code for a motor before so I do not know if folks are being legit or sarcastic here. So, here are the details:

It came out of a 1968 Mercury Cougar witha "J" for the engine code. The car had under 20,000 miles on it when it was wrecked and parked. The motor was pulled in 1981 and sat in a shop in Forney, TX until last week when I got it.

As I understand it, the 302's bore either an "F", "J", "M" or "K" for the motor code in the VIN depending on the performance of the engine. The "K" in 1968 I know :-) so the other letters are a mystery to me. All I can see so far in the literature I have been referred to is that the "J" code refered to a 4V 302 with a 62cc combustion chamber where the other 4V 302 were only 55cc.

The block casting numbers are C80E 6015A
The head numbers are 302 4V 7M4
The carb is a #4100
The intake manifold I have to go with it reads C6OE-9425B 6F29

So, what's the real story here? Someone please let me know.

Thanks

8mpg
01-31-2007, 08:57 AM
I am new to this forum thing so forgive me if I am being foolish or downright ignorant. The motor is or isn't anything worth taking notice of? Someone tell me straight.

I've never run into a "j" code for a motor before so I do not know if folks are being legit or sarcastic here. So, here are the details:

It came out of a 1968 Mercury Cougar witha "J" for the engine code. The car had under 20,000 miles on it when it was wrecked and parked. The motor was pulled in 1981 and sat in a shop in Forney, TX until last week when I got it.

As I understand it, the 302's bore either an "F", "J", "M" or "K" for the motor code in the VIN depending on the performance of the engine. The "K" in 1968 I know :-) so the other letters are a mystery to me. All I can see so far in the literature I have been referred to is that the "J" code refered to a 4V 302 with a 62cc combustion chamber where the other 4V 302 were only 55cc.

The block casting numbers are C80E 6015A
The head numbers are 302 4V 7M4
The carb is a #4100
The intake manifold I have to go with it reads C6OE-9425B 6F29

So, what's the real story here? Someone please let me know.

Thanks

the C8 on the block means its a 68 block

Maverick
01-31-2007, 09:20 AM
As I understand it, the 302's bore either an "F", "J", "M" or "K" for the motor code in the VIN depending on the performance of the engine.


Okay, time for engine code school (brief summary related to 289/302)

A - 4 barrel 289 - regular fuel - used from 64 thru late 67

C - 2 barrel 289 - regular fuel

F - 2 barrel 302 - 68 thru 79!

M - This is 351 engine, either Windsor or Cleveland - used 69/70 - not 289/302

K - HiPo 289 - premium fuel - used from 63 thru late 67 - solid lift cam only



The block casting numbers are C80E 6015A
The head numbers are 302 4V 7M4
The carb is a #4100
The intake manifold I have to go with it reads C6OE-9425B 6F29

So, what's the real story here? Someone please let me know.

Thanks


C80E - 6015-a factory casting for 289/302 blocks...67 and 68 (and Tim, there are 302 blocks cast as early as May 1967, when 302 weren't even available yet...)

302 4V - obvious

7M4 - 1967, November 4th (alphabet, skipping "I" which can be confused with "1")

Carb - 4100 autolite - looks like a 2 barrel autolite, but with secondaries - I rebuild these/have several, looking for more

C6OE-9425 B - standard 4 barrel intake for small block 289/302, B designates late change in design, and date code June 29, 1966 (which is correct for any 68 model year car, as most Ford parts are built/cast months ahead of vehicle being produced, usually 60 to 90 days is the norm)


*SIDENOTE* - A UAW strike in August, 1967, delayed engines being supplied to Ford, shutting down assembly lines...many 68 models were delivered late as a result, and/or have peculiar items installed on them...


Example: I own an August built 1968 Fastback with factory installed A/C, yet has correctly dated coded radiator for a non A/C car:eek: , as well as a factory deluxe interior (yet, I do not have a woodgrain steering wheel rim, yet it DID come with a standard red rim steering wheel with a deluxe horn pad (documented my an MCA judge)...all this lined up with the fact my car was built on the day the strike ended;) (most likely throwing parts together to complete cars and get the line moving again, thus producing the "factory freak" I now have...

8mpg
01-31-2007, 09:21 AM
Okay, time for engine code school (brief summary related to 289/302)

A - 4 barrel 289 - regular fuel - used from 64 thru late 67

C - 2 barrel 289 - regular fuel

F - 2 barrel 302 - 68 thru 79!

M - This is 351 engine, either Windsor or Cleveland - used 69/70 - not 289/302

K - HiPo 289 - premium fuel - used from 63 thru late 67 - solid lift cam only






C80E - 6015-a factory casting for 289/302 blocks...67 and 68 (and Tim, there are 302 blocks cast as early as May 1967, when 302 weren't even available yet...)

302 4V - obvious

7M4 - 1967, November 4th (alphabet, skipping "I" which can be confused with "1")

Carb - 4100 autolite - looks like a 2 barrel autolite, but with secondaries - I rebuild these/have several, looking for more

C6OE-9425 B - standard 4 barrel intake for small block 289/302, B designates late change in design, and date code June 29, 1966 (which is correct for any 68 model year car, as most Ford parts are built/cast months ahead of vehicle being produced, usually 60 to 90 days is the norm)


*SIDENOTE* - A UAW strike in August, 1967, delayed engines being supplied to Ford, shutting down assembly lines...many 68 models were delivered late as a result, and/or have peculiar items installed on them...


Example: I own an August built 1968 Fastback with factory installed A/C, yet has correctly dated coded radiator for a non A/C car:eek: , as well as a factory deluxe interior (yet, I do not have a woodgrain steering wheel rim, yet it DID come with a standard red rim steering wheel with a deluxe horn pad (documented my an MCA judge)...all this lined up with the fact my car was built on the day the strike ended;) (most likely throwing parts together to complete cars and get the line moving again, thus producing the "factory freak" I now have...


smartass :rolleyes: :D

Maverick
01-31-2007, 09:22 AM
Based on the above info, I'm willing to bet the engine this car was in was built and installed around November - January time frame...

Maverick
01-31-2007, 09:23 AM
smartass :rolleyes: :D


No...enthusiast/former judge ;)

propellerhead
01-31-2007, 09:25 AM
That's too many details for me to follow... ;)

homealone
01-31-2007, 09:28 AM
I am new to this forum thing so forgive me if I am being foolish or downright ignorant. The motor is or isn't anything worth taking notice of? Someone tell me straight.

I've never run into a "j" code for a motor before so I do not know if folks are being legit or sarcastic here. So, here are the details:

It came out of a 1968 Mercury Cougar witha "J" for the engine code. The car had under 20,000 miles on it when it was wrecked and parked. The motor was pulled in 1981 and sat in a shop in Forney, TX until last week when I got it.

As I understand it, the 302's bore either an "F", "J", "M" or "K" for the motor code in the VIN depending on the performance of the engine. The "K" in 1968 I know :-) so the other letters are a mystery to me. All I can see so far in the literature I have been referred to is that the "J" code refered to a 4V 302 with a 62cc combustion chamber where the other 4V 302 were only 55cc.

The block casting numbers are C80E 6015A
The head numbers are 302 4V 7M4
The carb is a #4100
The intake manifold I have to go with it reads C6OE-9425B 6F29

So, what's the real story here? Someone please let me know.

Thanks

Is a 68 J code 302 special? To me, no, to someone with a J code Mustang, Cougar, etc, looking for a J code 302 with a matching date code, sure.

The J code uses the same block, crank rods and pistons as the 68 2v. But the J has closed chambers that raised the compression ratio. And since it uses the same size valves as "most" of the production 289/302 engines of those years, all you have are slightly different cylinder heads.

As for your intake, the casting number says 1966. In a "numbers matching" instance, that would not even go with the "J code."

If it were my motor, I would focus the sale of it to those looking for a J code with a specific build date. The build date will be a second set of numbers near the casting numbers. From a performance standpoint, IMO, it's just another 302.

As for your stated .040 overbore to remove rust, that's a lot of rust. If you have it machined, try to remove as little as possible.

Good luck with it, try listing it on vintage mustang and cougar sites. Those guys will be more numbers specific than most of the members of this site.

Maverick
01-31-2007, 09:33 AM
As for your intake, the casting number says 1966. In a "numbers matching" instance, that would not even go with the "J code."



Wrong...even tho it has the C6OE 9425 B intake, the casting date says otherwise...


Show me a C7OE-9425 intake Kevin if you claim to be such an "expert"...

homealone
01-31-2007, 09:35 AM
Wrong...even tho it has the C6OE 9425 B intake, the casting date says otherwise...


I stand corrected and I never claimed to be an expert.

Falcongunner
01-31-2007, 09:41 AM
[QUOTE=To Many Mustangs]I am new to this forum thing so forgive me if I am being foolish or downright ignorant. The motor is or isn't anything worth taking notice of? Someone tell me straight.

I've never run into a "j" code for a motor before so I do not know if folks are being legit or sarcastic here. So, here are the details:

It came out of a 1968 Mercury Cougar witha "J" for the engine code. The car had under 20,000 miles on it when it was wrecked and parked. The motor was pulled in 1981 and sat in a shop in Forney, TX until last week when I got it.

As I understand it, the 302's bore either an "F", "J", "M" or "K" for the motor code in the VIN depending on the performance of the engine. The "K" in 1968 I know :-) so the other letters are a mystery to me. All I can see so far in the literature I have been referred to is that the "J" code refered to a 4V 302 with a 62cc combustion chamber where the other 4V 302 were only 55cc.

The block casting numbers are C80E 6015A
The head numbers are 302 4V 7M4
The carb is a #4100
The intake manifold I have to go with it reads C6OE-9425B 6F29

So, what's the real story here? Someone please let me know.

Straight talk from Falcongunner,

The 1968 (only) Mustang/Cougar "J" code 302 was the mild performance engine for 1968. It basicly replaced the 289 "A" code engine from the 1965-67 Mustang and Cougars. In the 289 the higher compression was from different pistons but in the "J" code 302 the higher compression was from use of different heads. The heads are a one year only (1968) aplication and are identified by the casting code C8OE-F and 302 4V with a combustion chamber of around 53-56 cc. The engine also used a different 4bbl carb (not a 4100) than the previous (1965-67) 289. They were good engines for the time period being a basicly stock 302 with a little more compression and carb. This was a popular option at the time and thousnds were made.

Is it special???

Well, I guess it depends on where you are coming from. When us old time ford lovers needed better heads to put on our engines we grabbed the 351 DOOE heads or the C8OE-F 302 heads. The 351 flowed better (about like a GT 40) and the 302 4v heads had higher compression (but flowed like crap as did most Ford heads of the time). With todays great and econonomical selection of Ford small block heads no one would think of using these heads for a performance build unless they just have them laying around and wanted to use them for a low performace el cheapo build. So from this perspective there is nothing special about the J code (other than it is a decent engine).

From a collector's or restorer's standpoint the "J" code has some value to restore a particular vehicle. To them it has value. So pull he heads off, list them on E-bay and watch the bidding fun begin. Other than the heads and carb it's just a regular 302 2bbl engine ("F" code).

Hope this helps.

Wayne from FW

Maverick
01-31-2007, 09:49 AM
Any Input or advice on where to find it?


Summary - you have a desireable 302 J-code with the wrong carb on it...most desireable part being the cylinder heads for someone restoring a numbers matching car...


Need more info? Go here:

http://links.vintage-mustang.com/index.html?links-webrings

To Many Mustangs
01-31-2007, 10:43 AM
I feel like I just stood in front of an open fire hydrant trying to get a
sip of water :-)

Thanks everyone for the insight. My little motor is in the PM machine shop now getting cleaned and magnafluxed. It may or may not have a future in one of my cars. I generally do not fool with 68 and up cars but it can make a healthy motor in a 65-67. If it sells, so be it.

In my defense: I have owned numerous Mustangs from 65-66 and still own a 67GTA "S" fastback car and a 65 GT "A" coup. I built both of them from crusty rust-buckets. All of my cars so far have been "all there" when I bought them so this is a new situation for me. I love to restore them to drivers and pass them on to guys who make trailer queens or people who actually enjoy driving classic/cool Mustangs. My appreciation for those of you who are wise enough to judge and recognize origionality and obscurity has definatly been increased today.

Thanks again. I have facts to sell the thing with or reasons to keep it...however ya' look at it.

Anyone interested?