I have the 230/236 cam with .622/624 lift with 1.6 rockers which I already have. I could try and sell the 1.6 rockers and get 1.5 rockers but what I was thinking is just changing the springs and gp the .622/.624 route. My next question is, what springs will be able to handle this? Is it possible to do this without machining the heads? I have 4k old headgaskets on there and I am not terribly in the mood to try and unbolt the headers and everything to take them off again!!! I will if I must however. Could somone recommend a valvetrain? I have the Cmotorsports cam kit on the car right now along with comp R lifters.