The Engine I am going to swap into my '67 F-100 is currently in a '67 Mustang. The Casting number is #D8VE-6015-A3A. I do not know how to decode it. I do not think it is a original, witch would be a 289, because it has the fittings for the smog and a fitting with like six 1/8"-vacume hose fittings on it witch looks the same as the one on my 84' Fords 351w. So, I think they swaped in a newer motor somewhere in the cars history, and if it is newer I think it might be a 302. If anybody has any info on this, or if you can decode the number, I would deeply apreciate it.

-Matt

 

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289 and 302 rotating assemblies use the same block. In mid year 68 Mustangs changed from 289 to 302, my Mom has an early 68 w/ 289. The bore between both engines is 4" (virgin, not bored over). The stroke of a 302 is 3" the 289 is 2.87". The casting code: D8VE D is for 70's 8 is for 78 V is probably for Lincoln E is for Engine part 6015 is basic code for Engine block and A3A is the particular engineering revision. I don't have numbers that go much past the mid 70's, that particular casting number isn't included in my book. I'm guessing you have an engine that was replaced/rebuilt in it's past and that the block had originally come from say a 78 Lincoln Versailles? This doesn't mean it still might not be a 289, you need to either determine whether you have a full 3" of stroke or get a casting number off the crankshaft. Nothing says that the rebuilder didn't just use a newer block and rehabilitate the 289's crank/rods. I'd bet that your block has been bored at least once in its earlier rebuild. The engines are close, I'd think a 302 is more desirable in a torque, truck application, and a bigger type V8 even more so. If you drop the pan and can find a crank casting number, heres the list I have of crank #s'
289: C2OZ, C3OZ, IM, IMA (4 separate codes I'm showing)
302: C8AZ-A, 2M, 2MA, EOSE-AD

Another consideration is that a 5.0L crank is balanced differently than the earlier 302s significatly so. A 5.0L is still a 302 but after 81 they changed the balance and external weighting alot. Who knows when the motor was rebuilt. I don't know the exact #'s on the balancer, but the Flywheel or Flexplate on a pre 81 302 and all 351's is 28oz offset either cast as a pie shaped thick spot on the flywheel or a weight tack welded to flexplate. The 5.0L weight is 50oz instead of 28.

BBT

 

BigBrownTruck,
Thanks for the information, and decoding my nunber. Man, you gotta be the smartest one in here, you answer almost all the questions.

-Matt