OK I just bought a pick up to swap the axle out of my 73 Jimmy. the truck is a 3/4 ton 8 lug monster. The problem is I don't know what king of front the truck has. It has 10 bolts like my 44 in the Jimmy but the sides are rounded not flat any body have a clue???? also the hubs appear to be like step down models?? Any clues here the hubs don't mate smoothly to the rotor they have like 4 keys on like you turn it off with a really big socket. I am lost here any ideas. Also I would like to use the truck T400 but the truck has a NP203 and the Jimmy has a NP205. I want to keep the 205 will the tranny from the truck bolt up to the 205 or will I have to change the output shaft?????