Looking to buy/build 500-600 fwhp 360

Lurch59 said
How much horsepower do you think I have? 360 with high-performance cam, improved springs on the valvetrain, and headers? I'm guessing 350 hp?

Probably, add a 100 hp shot and see what she does, probably enough to get to 11’s if not then go from there to reach your goals.