Going with an Andrews tw21 cam, with the SE roller chain oil pump/chain tensioner conversion kit. I hate that the secondary drive does not incorporate a roller chain, but whatever...I already bought it. Would anyone recommend replacing the OEM hydraulic tappets/lifters? Also I'm kicking around the idea of going with ULTIMA 1.675 ratio ROLLER ROCKER ARMS. I'm told they are loud. Anyone had any experience with these? Also considering Fueling hydraulic roller lifters for this build. Should I or would I be wasting hard earned cash? Anybody?