the high pinion axles have the pinion centerline above the ring gear center center line, so the driveshafts will be higher up on the pumpkin which will help with the drive shaft/u-joint angles. I wouldn't do an engine swap that wasn't injected, multi port is better then TBI but harder to do but bother better than a carb. fill out your profile for us, so we know what your starting with and we can possible help better
Sold) 94 YJ, 4.0L 5 sp manual, Hard top, 33/12.50s, 4.10 ring&pinions, Polished D30 w/Aussie front, 8.8 rear w/ LS, 2.5" RC, 2" BL, 5/8" booms, TJ flares, SYE, custom F/R bumpers and rock sliders, 8k winch, dual optimas, HO alt.
2) (Sold) 99 TJ, mustang 5.0 GT 40, AX15/231J, trektop, 37x12.50r17 cooper STT, superlift 6" long arm, D30/44 w/ ARBs & yukons, customized warn bumpers, custom sliders, 12K winch w/ synthetic rope, custom paint
3) 2007 JKU being built now