Well, thanks for all your help guys. Due to cost I am going to replace my T50 with... another T50... for now. I realised that if I change to a W5*, I'll need to get a custom tailshaft. And if I've got to get a custom tailshaft, I may as well change the diff at the same time, instead of getting a second, shorter custom tailshaft further down the track. Later when I've got the money, I've decided I'll get a W57. I know that it doesn't have the steel sandwich plate, but I think I'll hardly need it for a 4AGZE. Thanks again everyone.