i am being told T60-1 or GT67 so whick one should i get, which one is better worth the money. and what are all the dimensions on the turbos and what do they mean and which dimensions would be best for my system

sts style, FMIC, 9-10 psi

 

pretty big difference between those 2. The GT-67 would rock on the top end but its gonna be laggy as hell on a low powered 5.3L. On a 2wd truck though it would be my choice simply because a smaller turbo is gonna spool really fast and wheelspin is gonna be tough to deal with on the street. Just really depends on what kind of power you wanna make

 

well my truck is 4wd so the t60 would be my best choice right. and this will work fine for 9-10 psi

 

The T60 may be a little small once you start modding seriously. Maybe a GT35?