Let me see if I can help.
Unless I'm wrong, the simplest soloution would be to use your old sub axle and keep T-1 cv's.
The next would be using a T-2 size stub axle. Then you'd have to change the 'Output Flanges' on your gear box to ones that are T-2 size. (Either aftermarket or Thing output flanges) Then I believe you'll have to get differant axles. A Sway-away free floating axle, since the T-2 cv's are wider than the T-1.
I've read about this but I'm not that far into my project yet.