hello mate just finished converting mine to rwd and its the best thing ever now not only with the looks the escos has but the rear wheel action also puts a smile on my face if your gonna use a complete 2wd setup then give dan @rapidford a call hes got a rwd escos and was a great help to me both at sourcing parts and advice i know he can get the gearbox craddle you will need,the parts i changed over from back of car to front was
complete shafts,rear beam,diff,2wd prop shortend by 60mm,gearbox craddle,2wd gearbox mount,t5 box,speedo cable and clutch cable,2wd sump,2wd modine and bolt+oil filter,2wd crossmemberand steeringrack with coupling,engine mounts and arms,i also did away with the old v belt system and mounted the alternator on pass side and power steering pump on drivers with all pipes and cooler pipe,with 2wd crank pulley,2wd coilovers ,hubs and brakes including callipers.
hope this helps