The only thing Jeep is the body... I streched a K5 Jimmy frame 2.5 inches and put the body on it along with the 350ci, TH350 auto trans, D44 front and 12 bolt rear. I think it works just fine now to finish it up into the rig I want it to be...
Sounds like you've tinkered with everything so should be reliable and fixable. Hows the 12 bolt rear? Not familair enough with them. Also do you plan to be wheelin it when your away, I know I would.