what kind of motor or gears are you using to ever thinkl avout destroying a for 9 inch???? I had a 9 inch in my 76 ford pickup behind a 428 cobra jet and never had a problem with 345 factory rated hp. Unless you have a V8 with a blower, don`t worry about wrecking a 9 inch.
Warn has high strength Inner Front Axles Shafts for 71-77 Bronco (read dana 44) driver and passenger. Right side part # 38810, length 27.94", 30 spline, u-joint 297X. Left side part #38809, length 18.31", same spline and u-joint as right side. Warn will also custom cut lengths for you.
Outer Axle Shafts for 71-79 Ford Bronce and F-150. Part # 38816, length 9.72, 19 spline, 297X u-joint.
Warn also has Full Float Rear Axle Kits for Broncos from 66-77 and 66-81 pick-ups. Also Dana 60, Toyota FJ40 and FJ60 and a whole pile of jeeps. If you want induvidual part #'s just let me know as there is a whole bunch for the broncos.
They alo have disc brake kits for 66-73 Bronco with small bearings and 66-75 big bearing and 76-77 as well. Part # 37948 for 66-73, 37766 for 66-75 and 37765 for 76-77.
If you take all of these parts and some auto wrecker shopping, you could make some pretty sweet axles for you nissan