What kind of open spring pressure would be needed for a 220/[email protected] .470 lift (1.5 rocker) HR regrind from Oregon Cam? Only spec Ken gave me is no more than 110 seat pressure. This would be on 308 casting head.
Will the stock Eddy head retainers work with 987 Comp double valve springs? Using a Comp XR274HR hydraulic roller cam with stock roller lifters and they recommend the 987 double valve spring.Just wondering if I will have to buy new retainers also.