Nah, keep your shoes on, you may drop something on your feet or burn them with welding slag.
The answer to your D60 question is both. Some people run them full length and like the added width for stability, and some people like to cut them down to fit on the narrow trails. It depends on the terrain, what you're doing with it, and personal preference.
Part of the reason people cut them down is the width of the CJ frames, which are narrow. I am running D44's, and had to outboard the front springs for the axle to fit.
The answer to your other question is also yes. I run a Scrambler, and have swapped in an SM465 with the attached NP205 (twin sticked of course), and my rear driveshaft is still 33" long. I'd like to do the Doubler in a few years, when money is available. The CJ-8 (Scrambler) has a 103.5" wheelbase, and some peope stretch it a little if they need more room. The Scrambler is hard to find though, as only 28,000 of them were made.
A YJ (Square headlighted Wrangler) would make a nice swap, just find a body and frame and start from there. The YJ frames are stronger and wider, and the YJ tub can be modified to achieve a longer wheelbase. There are a few guys running modified YJ's on here. They are also much easier to find, usually aren't as rusted (the newer ones are even galvanized), and are cheaper than even a rusted out Scrambler.
There are people on this BBS running every tranny from NV4500's to Clarks in their jeeps, and even some that have grafted the jeep body onto a Blazer frame (complete with 12 and 10 bolt axles).
Interesting graft of the Hummer like grill/hood onto your truck. There are a few of them in a junkyard up here. What did you make the snorkel out of?
Winter Harbor, Maine
'81 CJ-8 Scrambled, It's a Jeep, Chevy, IHC kinda thing!
'88.5 Zuki, 7" Lift, Locked, Swamped, Rolled, and just generally broken in right!