I was helping a buddy put a 700r4 into his 79' K5 yesterday and we had some problems. The k5 has a 203 transfer case and he put the "4x4 output shaft" in the 700r4 and thought that it should work. Well when we went to bolt them together we couldn't quite make it fit.:rasta: duh. Obviosly the 4x4 output shaft is meant for another case. I've checked with Advance Adapters and they do have the right shaft to make this combo work. I just wanted to check with you Chevy guys to make sure i'm not missing anything. Anything else we should know?