Going to be putting together a rather stock 390 for a loaded 68 Cougar GT.Its going to keep the stock manifolds,air pump(US car),air cleaner and will have a edelbrock performer on it..The RPM version apparantly is too high for the s pipe and air cleaner to hood clearance...
I am going to put a yet to be picked hyd roller cam in it..Are the stock rocker shafts up to the spring pressure

.Its getting the stock PBF covers so end stands are out...I have a assortment of HD shafts....I would like to find the std wall thickness for oem shafts and compare it what i have.
Thanks...Cory