if i were closer id run you.im always looking to race. you would make more power with a better set of heads,compression is kinda low for a 5.3 lol

 

tell me about it! I got this system really before I should have and was told these heads would help protect my motor blah blah blah... anyways i just decided to keep them and bump it up to 14psi and see what happens that is if i have enough fuel