Reply to "S/S Pressure Tank"

Chuck is correct. Ford went through incredible gyrations in trying to engineer an automatic radiator air-bleed system (without spending much money, of course!) First, there was the dual air-bleed needle valves at the top corners of the radiator. Then, the right bleed was changed to a small rubber hose about 18" long that went down to the 'return' radiator pipe. The final iteration was the same small rubber tube that went all the way below the car & back to the surge tank. Ford apparently believed that the all overheating problems stemmed from a radiator air pocket but proper bleeding techniques were far too exotic for the average Pantera owner. Practically speaking, the dual needles work the best IMHO but do take some common sense to use. The extra bib on the pipe or tank can be plugged off without harm (or cut off & the hole TIG-welded closed). My Sept '72 L model came only with the 2 needle valves so the small-hose adventures were '73-74.