my new 83 TC
Reply #18 –
I had PEP performance valves in my head. They were 1.89" intake and 1.59" exhaust and they didnt have the stupid second o-ring groove like chevys do. I hope the machine shop nows what they're doing, with setting spring pressure. The first head I had on my old ranger had 1.84" chevy intake valves, I had to install the keepers in the o-ring groove and use offset keepers to get the spring pressure where I wanted it. Needless to say I wasn't happy with it and a couple months later I pulled the head and installed hardened seats and the PEP valves. Spring pressures were perfect with just small shims.
PS, good luck and nice bird.