Gearbox swap on 6.2 diesel

[terik88]

I would like to aske someone if it has been swaped transmission from automatic to manual transmission?

I have a GMC sierra classic 6.2 diesel 4x4 with automatic transmission. I've seen some on youtube videos with that gearbox swap.

I see that NV4500 gearbox is the best considering heavy pulling at times.

 

I am rebuilding another 6.2 Diesel with turbo (possibly twin turbo) too add more power to the truck.

 

I am grateful for answers and tips and tricks regarding this project i have going on.