You can take that explorer rear drive shaft apart at the axle end ujoint and use the flange that bolts on the yoke, go to Napa and get a conversion ujoint 1310-1330 and put it on your rear yj shaft and bolt it on. That's what I did and been beating mine for a while. It seems to be a lot stronger than the straps jeeps have stock.
Also. Are ya'll moving the spring perches on the axle, or just tightening them down on the ones on the axle aready? Think the spring centers will be 5/8 wider on each side
We have everything you need to an 8.8 swap. http://eastcoastgearsupply.com/c-130046-axle-swap-parts-ford-8-8-parts.html
Adapter flange
Mounting bolts
Spring perches
U-bolt and Plates
Ebrake cables
Brake parts
Gears locker bearings if its for an8.8 swap we have it on the shelf
10% off right now thanksgiving sale. Promo code THANKS