well theres a small problem with that you will have to make all new mounts for the xj rear axle but if its the same rearend you could just change the gears in the rearend
I'm lookin for a good used header for my truck to free up a little power but i have almost no extra money but i might be gettin a job in the next week or so
so just let me know antidisestablishmentarianism you got