416 issues - losing patience

What radiator cap are you running... I have been battling overheating. I have a new Wizard Radiator and had bought a nice looking billet radiator cap for it. Found out the cap was barely rubbing the bottom of the hood, so I swapped on a cheap parts store radiator cap I had laying around (14-15lbs?). Immediately didn't have any overheating issues. Weird huh? Worth considering!