And the camshaft looks to be a Crane #283941
And here is the info on that camshaft:
Crane Cams 283941 H-272-2 Hydraulic Flat Tappet Camshaft Pontiac 265-455 V8 55-81 Good low and mid range torque, Good idle, daily usage, towing, performance and fuel efficiency, 2600 - 3000 cruise RPM, 8.75 to 10.5 compression ratio advised.
Part Number: 283941
Grind Number: H-272-2
RPM Power Range: 1800-5400
Duration Intake @.050": 216
Duration Exhaust @.050": 228
Advertised Duration Intake : 272
Advertised Duration Exhaust: 284
Lobe Separation: 112
Valve Lash Intake: 0
Valve Lash Exhaust: 0
Gross Valve Lift Intake: 0.454
Gross Valve Lift Exhaust: 0.48