Hey Jay the TB spacer won't do anything just make a "cold air intake" your injectors and header
And also if you get axles from a 2.5 manual Cherokee they have 4.10's and I'd suggest finding a Chrysler 8.25 or d40 rear
Yes i ran out of gas a few times and i tried moving thr needle but as soon as i turn thr key it goes right back i was wondering if there was adjustment