I think what Mopar_Nutz was trying to point out is that since this is a 89+ car you are looking at it has the common block engine casting. This casting was beefed up, and considered more reliable for high hp applications. It is pretty much accepted by most turbo dodgers that the 88 and below block is good up until about 250 hp reliably. Supposedly anything higher than 250hp on the pre 89 blocks will cause the mains to fail.
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