I think the $25 I spent to become a paying member is the best money I've spent on my truck. You should do it...you won't regret it.
Anyway, my shaft is out of an 86 XJ. Melt the pins in the shaft with a torch and compress that sucker with a BFH. Spread the ends of the shaft so they will fit around the gear box and steering column....test fit and then grind a groove in the steering column to allow the bolt to fit over the end of the column (just like it look on the Jeep you pull the shaft from)...bolt that sucker up.
On second thought, pay the $25 and read the article (with pics). It takes all of about 20 minutes to do the swap.
Benefits are the loss of the rag joint which equals less slop and a better feel of for the truck.
I'm an idiot and I figured it out very easily.