Hi All!!! Took my 65 122s in last week end for new tires and to have cooling fluids drained and replaced. First off I could have sworn I read of and actually saw an additional drain stopcock on the engine block near the oil filter, but at the shop we could not locate one. Anyhow we drained the best we could and even raised the rearend to drain some more. While refilling with coolant the guy doing it realized the cap that was on the radiator is not proper size. or deep enough to fit the neck of the radiator therefore not allowing the proper pressure to build for fluids to circulate right. It has always ran on the hot-side as far as dash thermostat reads. not being a motorhead guy I didnt even think about the radiator cap, but I'm learning. Does any one know the proper size of cap and where I can locate one? Thanks!!!