First thing...get rid of the stupid nylon cam gear some of these had. I had a '68 with the 304 V-8 that went *clank*! When I tore it down, I found the gear on the cam missing 1/2 its teeth. They bonded nylon gear teeth to a cast aluminum hub, probably to make it quieter. All mine did was save up all the noise and put… » 10/27/14 3:01pm Monday 3:01pm