Quote:
Originally Posted by special-K
Ok, I didn't know that. I do know that my '68 truck 327 is the same block as those two. So, this settles many debates over 4-bolt vs 2-bolt. It all depends. You can actually have a better 2-bolt block than most 4-bolts. These are high nickle and very desirable for performance builds. Mine was done in '07 and I forgot whether it was 2 or 4-bolt. Guess I remembered wrong. I can sort of remember seeing it was a 2-bolt now that we're talking about it. So, relatively speaking, these '68 large journal small blocks are fairly rare being one year only and 47 years old, last 327,first 350s, and the elusive 302. Rare and desirable
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I had not keyed in that there were no 4 bolts in '68 until yesterday. I had always assumed that the Z28s and SS350s in '68 got them. I knew that the '68 Corvettes did not. So that makes it even less likely that a 327 ever had 4-bolt mains because in '69 the only application for 327 was Camaros and B-bodies-and it was a more base engine as both had 350 performance engines available. By 1970 the 327 was gone and the 307 and 350 was it.
Some LJ blocks cross over boundaries. For example, the 3956618 blocks were a 2-bolt for 68-69 327, a 4 bolt for 69 Z28, and 2 or 4 for 69 350. the famous 3970010 (and 3932386) is similar, but has no 68 applications. The raw casting had enough meat in the right places to machine it with either style cap.
So, back to the OP. No SJ block ever had 4-bolt mains. No documented 4-bolt LJ 327s were built. I could see a possibility in '69 with 0010 or 2386 block, but with all my searching I have yet to find anybody that can prove they have a legit one. And as we know, you could never prove it in a truck even if it did happen because the VIN derivative is not on the engine pad.