Hey, Need help with block casting number, Trying to figure out if what I have is a 302 or 351. The block casting number is D80E-6015-E3A with date code = 8F27, also has near casting number on a tab a large 79, also has a sideways 27 in same area.

I pulled what I thought was a 302 motor from a 1970 F100 Ranger to use in my 76 Bronco, been having issue with getting it to fire up. Also if it is a 351, I used my original edelbrock alum intake manifold on this motor, I'm thinking if the block is indeed a 351, then my intake could be an issue as well as the firing order. Any help appreciated.

 

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Deck height(center of crank to top of deck) is a little more than an inch taller on the 351. Also distance between heads is about two inches(?) wider on a 351. I think you would have ran into problems putting it in as it's not a drop in replacement. Your 302 distributor will not fit in a 351, it's too small. Hope that helps a bit.

 

As gfw1985 eluded to, the 351 intake is wider than the 302 intake, so you can't swap the two. If your intake fit, it's not a 351. Should be a 302 or maybe a 289 (not likely in your situation). I'd double check the firing order & then make sure the plug wires are correct.

 

D8OE-6015-E3A = 1978 bare block casting number. But, there's no way to cross reference casting numbers to Ford part numbers, because they are foundry marks.

The engine could be either a 302 or 351W (both have 6 valve cover bolt holes per side). 351M/400, 460's use different block casting numbers than D8OE.

8F27 = Bare block cast June (F) 27, 1978 (8).

 

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