Ryan set up the heads at his shop after he ported them. Comp recommended a very light spring, comp 914-16, 368 lbs open 150 ish on the seat. Ryan said NO WAY, he set me up with comp 939-16, 450 lbs open and 190 on the seat. This was a compromise because of my Comp pro magnum rockers they tend to gall the rocker shafts with spring pressures over 450. With that said, Im going to try to banana groove my rocker shafts to help them survive.
He had to machine the heads for spring cups not sure about the diameter. I do know that the valve spring on the head bolt between cylinders 2&4 is going to have to come off to tighten my head bolts the nut fits on fine, no interference, but I cant get a socket on it.
