I’d like to put a five speed or a six speed transmission to replace my T 19. However i have no idea on what necessary steps i should take to make this happen. I’d like to keep it a 4x4 with a minimum of a 5 speed. Its a new truck to me so all i really know about it is, its a single cab with 133” wheel base, with a 400cubic motor. Currently running a 4 speed t19 with a transfer case np205 (guy before me sold the truck to me as a 305).