I am not sure, as to the Mopar. I would think there is a difference, as on Chebbys, I know there is. I have always used the "true" roller double chains...but a few weeks ago,,had a 'low budget' dirt racer bring me a coffee can of crank/cam gears and a 'new' chain..?? NOTHING matched...I supplied a new "true roller" chain AND gears, degreed the cam for him and guess what,,everything is fine now. He couldn't believe it,,when he used all the other stuff and "lined up the dots" he had valve/piston clearance problems,,bent all the exhaust valves...??? Wonder just how far it was off..