I have a 36 PU with a 59a engine. I have the heater coming off the pass side of the engine at the top of the head and the return going in at the radiator bottom hose with the standard fitting ford provided.(standard connection) My question is this set up allows the passenger side of the engine to run 15-20 degrees hotter than the drivers side - is there a way to balance this out better? 36fordguy