I am breaking ring n pinion gears when i launch I am running 26-10.50 slicks i have tried running drag radials but i do nothing but spin out of the hole i have tried ajusting the shocks i am running a gtu rearend

 

The T2 rear end is a bolt in, you would need half shafts the complete 3rd member and a new drive shaft flange assuming your running some sort of custom drive shaft with an engine swap (my guess is V8). Depending on the U joint that your drive shaft uses I can tell you where to get the flange pretty cheap.
The T2 rear end is much stronger than any of the NA rear ends, the entire setup can probably be had for less than 500 dollars. I just put one in my 13bre powered gtu.