putting a 5.9 v8 in my 88 yj. want to keep the manual transmission so i need a ax15 and transfer case.[ my yj is a 4cyl/ax5 ].will a ax15 from a cherokee work? i found a np231[23 spline] from a yj i am supposed to go look at. i need a ax15 and need to know will anything work other than one from a yj?