Is it even on a billet core?

It’s probably lobe # R-483, which is in their “street roller” series.
280 advertised/240@.050, 153@.200, .350” lobe lift(.525 w-1.5), lash .028”

I’d consider it a roller version of the MP 528 cam.

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads