well the spindles dont swap, the hubs will in fact swap also giving you a wider axle. the hub gears inside the ifs hub lock outs will not interchange. the hub dials do in fact interchange. the safest way to do it is to use the sky mfg widening kit, this thread shows the cheapest.

http://www.pirate4x4.com/forum/showthread.php?t=218389&page=1&pp=25