Chances are you're going to need to get a MAPP gas torch in order to get it to come free. I've encountered a few extensions that a heatgun wouldn't touch.
As some of the members on here suggested in another thread, I ordered one of these direct from Mesa today. It should hopefully be here next week. Once I get it installed I will take pictures and report back my findings. Thanks again @StrangerDanger and @CAUS for the input and suggestions!