Drove Chunk a couple days. Definitely miss driving him.
I finally tackled my 4wd problem. And the problem that existed was in relation to vacuum and this existed before the TBI swap. and I have two theories, lack of vac supply or because the engine is 300k. Regardless I made use of a vac ball for a cruise control less Jeep as a reservoir for the 4wd to stay on at lower RPMs. I knew that if I used the XJ for 4wd kind of stuff that I would lose such thanks to the CAD and how it works. Course such probably wouldnt be a problem if the engine wasnt so high miles or just lack of vac. Anyways I put the ball in, revved the engine up and found 4wd to stay engaged than disengaging at high RPMs. So that is fixed. Woot!
Next is figuring out why the wiper system is shorted to ground.