Chevy Roller Rockers

I used the standard Chevy roller rockers, with my Crane conversion kit on my 5.9 Magnum. No guided rockers ,were needed. However, I did need a lash cap ,and a custom length pushrod, for proper geometry. The Crane kit ,flat works ,keep the valve spring pressures relatively mild (300 -330 full lift).pressure wise @
500"-.530" full lift..