Looking to buy/build 500-600 fwhp 360

Lurch59 said

I don't know. I'm not going to be at that power level, so I haven't asked any engine builders about it.

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I would not think that a stock block would support that kind of hp for very long especially in a racing application. A lot would depend on how much $money you spent on the rotating assembly and block mods like main caps and oiling.