[tom s]

I also say you should have more pressure!Lofting roller lifters is hard on the valve train.Really no down side and only upside.Tom

[Formula8]

Originally Posted by tom s

I also say you should have more pressure!Lofting roller lifters is hard on the valve train.Really no down side and only upside.Tom

Outside of increasing the need for the thicker wall pushrods, probably pulling the heads for a spring change, resetting the IH, replacing the head and intake gaskets, springs and possibly spring retainers. Cliff claims to be running up to 6000 with slightly lower pressures (either he or Dave B. posted earlier 140-145/380 @ IH 1.790-1.810 according to my notes). I'm planning on setting my rev limiter at 5800 and using a factory intake this time around. IIRC, there are not a lot of springs that increase pressure while fitting in essentially the same space. It makes sense to consider replacing the springs with something else next time my heads are off.