Hard to say, Tom but I'd suspect a stuck thermostat or at worst a water pump that has spun off the impeller. The block should have coolant in either of those cases, but I believe you're on the right track. At least the thermostat is an easy one to check and if it seems ok, the water pump might be the culprit. Good luck.


~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end