How much HP...again

Probably around 425 hp without knowing compression and head flow numbers. IF you built the car correctly then you put a higher stall converter in if it’s an auto, AND a performance oriented gear ratio which would allow you to use a 750/800/or even a 950hp carb for even more horsepower and the win ! You have a roller cam and aftermarket aluminum heads, try to borrow a bigger carb and I think you will feel the power.