if you gonna spend some Money and by the looks of it ..you are ..
why not toy with the Turbo idea ?
don't know what your trying to build..but a 6lb street strip /style turbo will make a bunch more HP on an engine then 6lbs of Blower..a Big reason is No belt drag on crank.
i got a 406 ci in a 69 camaro i have plans for a turbo in the future,,just trying to decide if i want to go twin turbo or single ?
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "