I still have the nascar cam in it. Learned that basically the roller ones are all around .750 lift older ones have around a .440 lobe newer have a .350 ish with a much bigger rocker. Also learned have to watch out for what cam gear it has on the back there where some different ones. Engine guy was very knowledgeable with r5 and r6s has a few dozen of them around his shop he had worked for Arrington for years and was involved with alot of the development. He had told me there is probably 25 hp in a purpose built cam but its going to be ruff on the valve train. I figured they had spent more money developing this stuff then i will probably ever make in my life why try and reinvent it. Would be different if i did not have to drive it track to track.

Sounds like it's a roller camshaft, based on the lift numbers he mentioned. I have been looking at roller cams and they all seem to be around the 0.430:-0.440" range the OP mentioned. But I could be wrong

If it was a Busch engine, it will be a roller camshaft engine. Only the Sprint Cup stuff is flat tappet, and from what I've seen, not a lot are sold off complete. Seems to be the Busch stuff mainly, with the odd Crasftman Truck engine. Dodge hasn't produced these engines since around 2007. I am surprized more people haven't jumped on the bandwagon

Its getting a clutchless g force 5 speed 3.29 1st with a black magic clutch 4.30 gear plan on shifting 1-4 at the track and 5th for the street