i don't think you need one in a cherokee anyways. the wife's 95 would break the tires free easily in turns and straights when floored.
did i tell ya'll my wrangler does it easily now too. i took my apple tv to a buddy's shop to get unlocked and loaded with a bunch of cool channels and on the way out i gassed it to get out in front of traffic quickly. it sounded like a sports car, rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr. and thats with the automatic shifting at 1700 rpms.