Skips correct, I've seen 455HO blocks (71-72) that were not as strong as a few 75 blocks. It's not Voodoo or rocket science, it's just a matter of looking for differences in the blocks...
And as soon as someone posted that "***" blocks are weak, everyone using one, or selling one would either be pis8ed or posting "My *** block has lived for 6 years running xx.xx... or the person that has one of the good blocks will be posting that theirs blew up making 500 hp... You can't win.
Anyone today that is looking to make 600+ Hp should be looking at an aftermarket block. IMHO.
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