I have a 1997 C1500 with the 4.3 gasser and 5 speed tranny.I am wanting to swap out the 4.3 and put in a 6.5 Turbo Diesel in its place, along with an NV4500 tranny.I have got a GM 14 bolt semi float rear end with 3.73 gears that I will be putting under the rear in place off the week 10 bolt...