okay im goin to start on a project engine that will probably take me about a yr to complete if everything is dun right and the right amount of funds. but im thinkin of building a supercharged 391 ci motor for my z28. and i want power so for the superchagrer i think im goin withthe weiand 6-71 blower. and i was wounder has anyone delt with that kinda blower becuz all ive seen are the little like 177 and 142 blowers that fit under the hood. but this being a project engine im lookin for sum good numbers out of this engine. how much boost does the 6-71 give? also how much estiamted hp could i squeeze out of a 391 with a blower on it with out breaking this so easily? so any ones opion is welcomed.