I've tried just about every cold valve setting that people suggested on this board for my 62, 235. Adjusting the valves hot is a pain in the butt and not very accurate because the motor is cooling down as you work on it. A long time ago a Chevy tech at the local dealer told me to adjust them to these settings:
hot: intake= .008 exhaust= .010
cold: intake= .010 exhaust= .012
I just readjusted them this afternoon cold, and the engine sounds perfect. It just makes a slight ticking noise.
