Indy/RHS Heads

66,
But they are lift limited as cast so keep in mind that some machining will need to be done and this cost will have to be added in. In as cast form they will accept about .500 lift with stock magnum valves, so cam choice is critical as is spring selection for the retainer style.

To me the cam would be too small to get all the potential thats avaiable in the port volume and flow. The same could be achieved by useing a std. LA casting with smaller port runners. Too large of port runner makes for lazy low lift port velocity and flows. And larger valves hurt this even more. IMO