I have seen very few SR SD455 blocks.
I have a SD455 block with no numbers at all, no SR #, no factory VIN, nothing. It was in a 72 Trans Am 4-spd that came from the WV area back in the 1980s. It had the typical WV rust from salt and wasn't worth fixing at the time, so I took it apart. The motor consisted of a complete SD455 short block assembly with a 72 455HO top end. The owner claimed that he blew up the original 455HO plus a second SR 455 block during the warranty period. After the last engine blew he complained so loudly to the dealership that they installed a SD455 short block in his car. Luckily that engine survived his heavy foot. The distributor was a SD455 unit with 73 production dates, and the block had the correct pistons and rods. I would have expected it to have some type of stamping on it, so I'm guessing that maybe the short block assembly may have been one available for purchase over the parts counter.
Has anybody ever seen a SD455 block with no stampings anywhere?
Mike
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