We pulled the head because we were getting low compression (30-40) in the number 4 and 6 cylinders and it was running very raggedly even though we've done a complete carb rebuild and replaced plugs, plug wires, distributer, rotor, etc...We know gas is good since we pulled and relined the tank and replaced all the lines. We will retorque the head bolts and adjust the valves and see what happens. Thanks all for the responses.
