Awesome! I grew up in Bailey (parents still live there) spent a lot of time wheelin' there and at crow's gulch. I had a friend who put his XJ on its side.
Just a thought, check all vacuum lines and hoses, I have seen a few trucks come in in the past with the same issue and it simply was disconnected, or had a hole or crack. Also I had to replace a catalytic converter once (95' Jimmy) because it was so clogged that the exhaust was going right back...