can anyone give me a guess on my horsepower of my car... my dad bought and put this engine in my car for me and didnt get much info on it. its a rebuilt 305. bored out .30, slightly larger cam(not sure on specs), slightly raised compression, i have longtube headers on it, throttle body spacer with the stock TBI on it. any guesses, not lookin for an exact number but a round one.

 

I think that would be impossible to guess without knowing the specs on the cam.

 

20 more then stock

 

Given that horsepower guessing has only emotional value, instead providing real benefit, I'll give three answers and you can pick the appropriate one.

If you're seeking emotional gratification, some indication that your rebuilt 305 is a real monster, then I'd estimate it at 563hp at the crank.

If you're looking for motivation to upgrade your powertrain, then I'd estimate it at 180hp at the crank.

If you're looking for an inaccurate but semi-realistic answer, post details of your cam, heads, intake, and exhaust system.

 

I agree.