In my humble opinion, GM Engine Oil Supplement is absolutely essential to properly break in a new cam. It isn't that costly, so why would you risk not using it?

Wash the lifter faces and the entire cam with solvent to remove the rust preventative that is applied at the factory. Then wash the lifter faces and the entire cam with a strong detergent and hot water. Dry thoroughly with wife or girlfriends blow dryer. Massage the black molybdenum paste that is supplied with the cam into the lobes and lifter faces. And I mean spend a little time and MASSAGE the lube into the pores of the metal on the lobes. Then smear the rest of it onto the cam journals and install the cam.

Prime the oil system, have a fully charged battery installed, have the timing set properly and have a primed carb set ready to run. If the motor fails to fire on the first couple of revolutions, STOP. Find out why it isn't firing. Does it need to be choked or what? DO NOT GRIND ON THE STARTER. THE MOTOR MUST FIRE IMMEDIATELY TO ALLOW OIL TO SLING ONTO THE CAM FROM THE CRANKSHAFT. OTHERWISE YOU WILL WIPE OUT ONE OR MORE CAM LOBES.

Do not use high performance springs to break in the cam. Use stock items and swap them out after the initial 500 mile break in period.