4 Spd driveshaft

When I put the 4-speed in my Duster, I only had to swap to the larger 727 size yoke...otherwise the same shaft as the A-904 fit perfectly for me. The '70 service manual is showing it as 49.27" centerline to center line on the u-joint bores

Should be right at 49"

I think the FSM for my Demon, same wheelbase, with a 4 speed and 8.75 is about 48.99"