i swoped shafts but what we did to my buddies is take a few washers. (3/8" i think) but just pull out the E clips out of the shaft and remover the indicator switch from the one end and tap the shaft out the other side (twords the vacume). rember where the shift fork goes both on the shaft in which side its on to lock in the axle. the put enough washers on the shaft so that it keeps it over to the side you want. then when you bolt everything up, make shure that you are in the center of the two shafts. thats it. plug your vacume lines. the indicator light is the toughest thing. i had a JB conversion on my 231 so i put it in the rear of that where the shift rod can hit it. hope this helps. E-mail me if you need some more help.
Its not what you buy...its what you BUILD!!!
1995 YJ ,SOA with 4" procomp front 3.5" BDS rear 1" shackle rear, custom stearing, 35x12.50x15 pro-comp MTs, warn xd9000i, on-board air from A/C, dana 44 rear and 30 front with 4.56, powertrax no-spin rear, custom disks rear/trutrac front, warn front shafts, HD SYE kit, HD front and rear driveshafts, Warn 4X flairs, PIAA 520 ligts and on and on and on :)