Talks about the Aussie gear for the factory Tcase in another thread has inspired me to dig up this thread.
The stats I got online on some Tcase options:

Gen1 Stock= 1.925:1
Aussie Gear= 2.85:1
Dana 300= 2.62:1
NP231= 2.72:1

Both the 300 and 231 have kits to make them 4:1

Looking at the numbers and what I have been reading and advice the 300 is sounding more appealing. The biggest thing for me is what is going to fit without altering the floor. Custom crossmember is not a big deal. Also making the tcase work for a driverside set up is important. I do like the fact that the 300 will not need a slip yoke eliminator (like the np231) it is a sealed unit. It also looks like the 300 is smaller than the 231 but about 10lbs heavier. Anybody wants to add info to this that would be great. I did alot of research and asked alot of members on here about all the info on the 231 now I need info on the 300. Thanks