i am rebuilding/upgrading a chevy 250. The engine was previously built up, 230 head, intake bosses removed, stud mount rockers, dual valve springs,shorty headers, holley, offenhauser,etc. I can't identify the camshaft, hoping someone here may have seen this before. 290s is the only mark on it at the tail end.

I have a solid lifter cam on the shop shelf with the same stamp for a SBC from CompCams so if it helps here are the specs for that cam, it may be a discontinued grind or ????
Specifications:
RPM Range: 2800-7200
Valve Lash.010 exhaust and intake
Valve Timing: .015
Duration: 290 intake 296 exhaust
Lobe Separation: 110
Duration @ .050" Lift:252 intake 260 exhaust
Valve Lift: .54 intake .558 exhaust
Lobe Lift: .30 intake .372 exhaust