I'm lucky to be able to get online, as I'm staying with my brother in law for a little while before heading to MA and NH. We have moved out of the house in Winter Harbor (wasn't that a PITA!), and haven't moved into the house in Waldoboro yet, hopefully this weekend. I may not have internet access for a few weeks though. Little_W may be able to keep people updated, or he'll know where I am if people need to get in touch with me for some reason.
The answer is yes, you can twin stick it without any serious mods, like grinding the shift rails. Please do a search, I posted pics of mine and of CJDave's setups. I used two NP205 shifters and made my own linkage, and CJDave made his own shifter out of another SM465 shifter as he couldn't find a second stick. There is no problem getting front wheel drive low range, and the only thing I could see grinding the shift rails did was allow you to get into high/low range at the same time, which is a no-no. To shift though, I have to shift 3 times, from rear high to neutral, then front high to front low, then rear to low. Grinding the rails would allow you to go from high to low without stopping in neutral.
Just to forewarn you, I had my adapter professionally welded, and it cracked on one side of the weld. New ones are $220, but I found a used one with another shifter for $95. Every one I found locally already had the crack across the top of it.
JEEPN
Winter Harbor, Maine
'81 CJ-8 Scrambled, It's a Jeep, Chevy, IHC kinda thing!
'88.5 Slamurai, 7" Lift, Locked, Swamped, Rolled, and just generally broken in right!