no matter what cam you use, pull the heads down and check all the installed heights. I bought the " up to 680 lift " version as I planned on using a .650 comp flat tappet. The springs that came on the heads coil binded at .680. I removed all the springs. Three valves on each head had .135 of shim under them. Most had .085 and some had .035. The installed heights were close to 1.945.
Andy F had used some Comp rollers with success , I thought he would of chimed in with a few recommendations. Birdtracker