My concern is that if it’s factory 455 crank in there that there’s two ways to do that. One way is sound and the other way is a ticking time bomb.
This can be done the right way with a modified Olds thrust bearing, or it can be done by welding the cast iron crank which is bad
Even a guess of just 460 Hp, no less 480 Hp is a very rosy guess when if we are talking about stock heads and a 280H cam.
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I do stuff for reasons.
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