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Looked at a 4 bolt main block out of a boat, supposedly a 454. Eng cast number is 1401544, kinda iffy on the first number as its rusty from all the salt water. Number on a front pad reads T10045XFF. Does say Hi Perf Pass on the block but my guess is that it is a mid 70's truck block??? It does have the extra external oil cooler hole by the filter. Appreciate any help decoding this if I have enough to go on here.
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Dave ![]() |
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