Yes Mr. Stock 49, how does one fill such a system in the first place?
On the older Chevy's the radiator cores run north and south - inlet tank on top/outlet on the bottom - the thermostat is well south of the upper tank in the radiator:
whereas in an early 70's Nova there is a lot less clearance:
with the upper water hose running more or less horizontally to the inlet tank. But top of the head (water jackets) are lower then the top core tubes (running east and west) in the radiator core - no?
Is your engine somehow sitting higher? An air pocket in the radiator is one thing. Air in the top of the head another.
