I have a 1970 Barracuda with 340. The steering will turn by itself either way. May start turning and keep turning by just touching the steering wheel or it may turn as the engine starts up.
It had a leak from the valve on top of the sector so we replaced the valve (with NOS part ) and the...
Forgot to mention I agree find the source of "plugging 80% of your radiator". Flush the H$LL out of it before installing new radiator. Pull the thermostat, flush block separate; heater core separate; then flush it again with some pressure if possible.
We run a 70 challenger with a 512 ci big block. It is an dedicated autocross car. It is driven on the street as well. It spends a lot of time idling in line before runs and also sometimes multiple back to back runs. The car previously had a Champion radiator with 2 speed electric fan and custom...