Installed a new 160* Thermostat today and now the gauge stays right in the middle even after 30 min of running when I removed the radiator cap I could clearly see the coolant moving . And when checking with a laser temp gun the lower red hose was at 140* and the upper was at 130* . The 3 heater hoses were at 158* . The cast iron intake by the thermostat cover was at 177* . At this point all the wiring is new auto wire and you can sit and listen to the re-pro wonder bar radio , the wiper motor has been re-built , all gauges work . It now needs to have the front clip put back on , as well as the tail gate , all trim needs to be reinstalled, as well as all the glass except for the windshield which is done , all interior needs to be done it's a work in progress .