The GT40 heads are direct bolt ons. With the right intake and cam you can get anywhere from 240-270RWHP. Depending on your trans and other factors. For the price you pay for them they are a great upgrade from the stock crappy heads.i can get some gt40p heads. do i need to do anything before i put them on or will they even go on.. i have a b cam. i am looking at 1.7rr but if not i will put 1.6.. need help with that.. or should i save my money and get trickflow, afr, or dart heads..
it doesnt really matter what you have, it matters what you want. if you want a mild setup with 225-260 rwhp, then go with the gt40p's. if you want to make more power, then ditch the alphabet cam and buy better aluminum heads. gt40p's are fine for mild power, but dont expect to make 11 second passes with them coupled witth an alpha cami have a t5, hedmen headers, cold air intake, no smog pump, no ac, no egr.