I agree that if you are going to use a blower, that you should rebuild the motor for it. I know that some of the smaller roots type blowers are made for stock compression motors, they will add around 100-150 hp at 6 lbs of boost on pump gas. For the price though, I would take the motor out and change the heads and cam. I would look into the 265cc AFR oval heads with CNC ported chambers and then get a different hyd roller cam and intake. I would guess that you would gain close to the same hp with this setup as you would with the stock motor and blower. Also, this way, you would not have to be concerned about the motor detonating, you would also be able to run 87 octane if you wanted to because of having aluminum heads. If you were interested in doing this, I would call AFR and talk to them, those heads have a slightly raised eshaust port, but from what they say most exhaust systems still fit.