Like the title says my 89 k3500 has a 6.2 diesel and a th400 operated off of a vacuum pump and vrv valve. What if i swapped a 2002 6.5 diesel and left the ip electronic. How would the vrv operate? is that even feasible? I just cant get this 6.5 idea out of my head and the only other trans i really want to put the effort into swapping is an nv4500 which is dependent on the deal i come across!