These are a little close. Stock covers give me 1 finger space. I started motor and revved it by hand to try to make motor flex into it but it doesn't. About 2 sheets of paper is about the space between the AC Delete Cover and Valve Cover. You think it will hit when I take it out an jump on it? Someone welded the motor mounts in it when they swapped from a 350 to a 455. I don't know if thats the problem or not?