Hello mustangers,

I'm a little out of place here as I am not a Mustang owner, but I am hoping that some of you can help me with a problem I have gotten myself into.

I recently purchased a 1974 Jeep CJ5 that someone had swapped a Ford motor into. I was told the motor was a 302, however after some digging I found that the motor was actually a 289. While I was talking with a carburetor guy online I sent his some pics of my setup and he said that he thought the motor was a Mustang engine. I don't know why he thought this. I am buying a rebuilt small block ford for the Jeep and was planning on sending the 289 back for a core. If this motor is an original Mustang motor I'm sure it would have value to someone wanting to restore, etc and I wouldn't want to just core it.

As far as I can tell it's all original except for the air cleaner, it has a two barrel Autolite 2100 carb, original valve covers, oil pan, intake and exhaust manifolds, I think even the starter is original by the look of it.

So my question is, can someone help me identify this motor? I have the block casting number, but not with me I will post it shortly (I believe it is C5AE). What other numbers will I need to get from the heads, etc to know if the engine is numbers matching, etc.

Thanks for any info,

G

 

that C5AE is 65 design, as 302 only appeared in 68 it can't be a 302. So therefore your friend seems correct.
there's a casting date at the front of the block (when looking at front of engine just where the driver side head meets the block. little hump. there you can identify the date. The 289 are getting rarer and rarer so maybe someone will give you a bit of money for it, but it's only those people who are really serious about having everything correct.
There's also a K-code 289, which you can't identify without taking apart and the biggest difference are the heads (they have two dots casted right above the "289" casting in the head. those will be worth something but chances are less than 1 in a million i guess that this ended up in a Jeep

 

Thanks for the reply Kalli,

I've got some numbers from the various bits and pieces:

Engine code: C5AE-6015E
Intake code: C8AE-947E B A (not sure on the 7, hard to read)

Exhaust manifolds codes:
C60E-9431-F
??9E-9430-A (can't make out first two digits)

But from those date codes it looks like bits and pieces were from different years, is this normal or does it look like the engine was pieced together? I just took the jeep to a shop to have some welding done, so I can't lookup the casting number on the hump, but will check it out.

Thanks again

 

You might want to see if it's a 5 or 6 bolt bellhousing block. I think it was in 1965 that they switched to 6. The 6-bolt is more useful to more people because there is wider aftermarket support for it, but I imagine that if it's a 5-bolt that an original-restoration guy needing a 5 would place a higher value on it.


Norm