Flat tappet to solid roller...

I like the Comp Xr280R too and wanted to get it but Howards cam suggested by IQ52 seems to be just perfect fit so I will go this way.

That Howards looks like a great grind...I'm sure it'll do what you want it to do. Can't go wrong with recommendations from IQ52...he knows his stuff for sure. Good luck and post back when you get it all together!