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I have a 72 Mach1, 351cj. Currently the engine is out and just back from the machine shop. I was expecting the block # to be "D2AE-CA, or possibly "DOAZ-D", or "DOAE-J- G". The number is in fact "DOAE-L OH4". Is this a replacement block or a standard number that I was unaware of.
Thanks for any input,
Keith
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Keith,
Like you I would imagine that it would have a D2 or possibly a D1.
Can you read any of the partial vin stamped on the rear of the drivers side of the block?
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You are correct in assuming you should have a D2 # on the block if the engine was original to your '72. '70 & '71 cars had D0 castings except the 351 Boss which had a D1 casting. '72 & '73 should have a casting # beginning with D2. Your D0AE-L number denotes a standard '70 or '71 passenger car 351-C, 2-bolt mains. The 0H4 is the casting date; 0 = 1970, H = August, and 4 = 4th day. (August 4, 1970) Hope this helps. GXR
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It doesn't suprise me that the engine is not original. It probably came out of Grandpa's station wagon. It may be worthy of note that it is a 4 bolt main block.
Thanks for the input,
Keith
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I have others tell me that they have found 4-bolt blocks in various family cars. The story is that the factory used what was left at the end of some runs. I don't know.
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The center main webs on the 351-C can be drilled and machined for four bolt cap configuration. The only 4-bolt blocks I've encountered were '71 Boss blocks, '72 H.O. blocks, and '72-'73 C.J.'s. I, too, have heard of such oddities, but only in the '72- up cars with D2 casting #'s.