What I meant to say my upper radiator hose was hot and my bottom hose was ambient temp.
I have only had a Dodge Dart with a 318 so I’m only familiar with that stock set up. My Duster has a 360 so I’m learning on the fly. So i appreciate u guys
Double check those heater hoses. If they arent both Hot, hot, hot, then you have a plugged Heater core. Thats what happened to my 72 Dumpster :thumbsup:
Unhook both hoses & put a garden hose up to the input hose, crank up the water pressure & see what happens. Once I evacuated all the **** that was in the core, all hoses were equal temp afterwards, & my 318 was around 195-200° all day long with a 180° thermostat, with no fan shroud.