Bill - Welcome to the world of superchargers (I see), where horsepower is a mute point and all you have to do is change a pully/belt. You will never go back to the darkside.
The real question in my mind is; What have you done to the rear end setup to CONTROL that power ? (not what is it?)
As for me it's around 600 plus or minnus with a 5th arm and watts linkage and very hefty steel parts.
cobrashock
