Shell Rotella T
synthetic has a good
zinc content and is recommended by Comp Cams. If you are running a flat tappet cam, DO NOT use modern passenger car oils!
A Comp XE282HR would be a comparable cam in a hydraulic roller.
http://www.compcams.com/technical/Ca.../72-75_230.pdf
RPM is limited to 6,500 max if that is an issue. There are custom grinders who will grind a HR cam that can rev higher. But to do it, they have to back off the ramp rates, so you somewhat defeat the purpose.
Kevin