Info on connecting driveshaft.
**Don't forget to check and set pinion angle before welding on spring perches, Please use these instructions and manuals
https://www.stovebolt.com/techtips/driveline/setup/index.htmlThat done you can now accurately make or reuse driveshaft.
The original AD 3/4 and 1 ton U-joint is a Spicer 1350 series. (1350 also used on 1.5 and 2 ton)
The 14 bolt axle always comes with 1350 series yoke (exceptions would be very few if any).
The 14 bolt yoke doesn't use U-bolts like the original Eaton yoke does.
Instead it uses straps and bolts. It's said that the aftermarket parts aren't quite right and you're better off getting the genuine GM parts, from GM, and they're not expensive.
Straps, GM # 3920486
Bolt, GM # 458300 (short) or 14018700 (long)
Or there are aftermarket U-bolt type yokes to fit the 14 bolt, either 1350 as original, or 1410 for a size larger
Try this linkThe 14 bolt I believe is a tad longer from yoke to center of axle, so driveshaft may need to be shortened.
Or, if you used aftermarket spring perches with multiple spring center bolt holes you can move the axle back some and driveshaft may fit just fine.
Moving axle back also makes wheels look better centered in the fenders on a pickup, unexpected bonus to picking the easy solution.
In any case confirm that the slip joint won't bottom out at any point during full rear suspension travel, and is not extended to far either.
I haven't gotten this far to iron out the details, but will update when I can.
