I'd set them at .018 and .026 and see if the bottom end comes back some. It should. That cam is a bit much for your converter. The old heads obviously had better port velocity to help compensate for other inequities.
I have set what comp cams advice is. Cant remember it.
These RHS have smaller intake cc than my old heads. These RHS heads looks almost too small from pushrod pinch area. They also have 10 times more better looking exhaust ports. and multi angle valvejob that I didnt have in old heads.
