use an s-10 rear from a 4wd truck and an s-10 t-5 and go here:
www.transmissionadapters.com place called bendtsens i bought my trans adapter for 185.00 and he set me up with a clutch setup and everything and it all slid right together with no problems at all, any problems or questions call bob and tell him what you have and what you want to do, he'll set you up, I did it and my 46 1/2 ton runs great, i put 150 miles on it today