Cam lobes look ok. Lifters show no odd wear and rocker shaft was opening the valves ok. Sprayed starting fluid all over the intake and carb base with no sign of vacuum leaks. Put a new carb gasket under the carb. Just pulled the head and the gasket looked fine. The valves all look good and open and close when tapped with a small hammer on the stem. I ordered a new head gasket to reinstall the head. 5 cylinders showed 125 psi and 1 showed 115. Back fires through the carb like timing is way off. Distributor was a new point one with a brand new gear.