Truth about roller cams.... BEFORE you make the switch......

The stock hyd roller cams were billet(but not the same material you saw in most of the aftermarket), and they also used a hardened(melonized) steel gear.

An actual pic of the Comp cam in question would quickly answer whether or not it was billet.
20-745-9 is a hyd roller with the short magnum snout.
The lift listed is for 1.6RR.

There was a period of time when those shelf XR grinds were done on SADI(cast) cores.

The Crane gear works on either.