I recently picked up a 1969 coupe. I am told that the original motor was replaced by a Boss 302 motor somewhere down the line. Where do I check on the engine to get the code that would ley me know what exactly it is? Also, how do I know if the heads match the motor? Is there anything else I need to check?


I recently had it in the garage and have it running fairly good now, but the carb is pretty shot. What would you recommend - an Edelbrock or Holley 4 barrel carb?

Thanks for your time. I am sure I will have more questions as I get into making this car nice.

 

well i dont know so much about BOSS Mustangs.. but these guys sure do have all the answers to your questions!!
http://www.bossperformance.com/

 

Quick and dirty, if your motor has 6 valve cover bolts, it's a Windsor. It has to have 8 valve cover bolts to be a BOSS.

 

I checked out the motor today and found the following numbers:

On top behind the carb: 15426878

Infront of the carb: CBAE-9425-B - The first B could be an 8 - I couldn't tell.

And on th sticker on the valve covers, it says C9AE-9C485-B


Can someone tell me what these mean and where else should I look?

 

Count your valve cover bolts first...

 

6 of em ...

 

If it has six, it's not a Boss.

 

Seems like a lot of people who don't really know what they are talking about think all 302s are Boss302s. I've heard this too many times.
And a guy at work who owned a 69 mach1 a while back claimed it had a 351C...from the factory. I called his bluff and after he described some things about it, I proved it was indeed a 351W. Just becareful out there, most people don't know what they're talking about, but really like the way some things sound as it rolls off their tongues...

 

the 15426878 behind the carb is the firing order, and it should be 378 not 878.

The first b is an 8. C8AE I beleave that's your head code

Run a google search for the casting #'s you'd be suprised what you might find.

 

Mach is correct on the BOSS thing. The Boss had Cleveland heads which used a different intake and valve covers. A lot of people call all 302's a BOSS. As for the part numbers on the intake...C8AE would be a 68 part number. Ford uses letters for a prefix for the year...C is 60...D is 70...E is 80...etc. D2 would be 72 for example. The rest is the part number (9425) and the B is the revision I believe.