Search Results for ‘more horsepower’

Hello, I have a 74 with a turbo 350 automatic. 30 over cylinders, isky cam with 485 lift, 280 duration. Double hump 186 heads. edelbrock performer and 650 holley. long headers and 2" dual exhaust. I was told it had 400 – 425 HP. That sounds high to me. My question is what are my best...