I had a problem with my 73 duster get hot like that...and went i was changing out the radiator, I found the lower hose was kinked where it made the turn to go up into the water pump...
Ill see if i can swap it out with another hose i have layin around the garage... The one on my car has one 90deg bend, the one i stole the spring from had two 45deg bends... And it came off a small block too!! Good idea, i hope its something lil like this!
