NV3500 behind a 340?

The one I bought/ parts was a 5.2 magnum/ 3500 4x4, Dakota. It used a fairly conventional looking diaphragm clutch. I did not bet some of the throw-out components in the deal. I'm sure the clutch is same bolt pattern as older B&B. Don't remember if it was 10 1/2 or what I may still have it............