Quote:
Originally Posted by Bmf5150
Wouldn't you be better off with a lsx427 than ls7 short block.much stronger
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If boosting is in your future, then an iron 427 is the way to go. The weak link of an ls7 is the cylinder wall/ block support gets thinner, due to the larger bore size. I would not boost a stock GM ls7 block, but I'm not sure the OP wants to boost this engine.
Some of the early ls7's had valve issues, but that's not an issue with the mast black label heads.