I agree with everything posted above but I just wanted to point something out. I have a 4 speed in my blazer and at times i've considered going auto with it BUT if you do it, it will take approximately the same amount of time, effort and most important $$$ to go with an overdrive such as a 700R4. If you get one on Craigslist or from a junk yard it won't cost you anymore to get the 700R4 and rebuilding it will be marginally more.
I just don't think it would be worth the effort to go with a non overdrive tranny in a swap like this. And you might even get better gas mileage as well.
I vote against the floor shift mostly cuz I just think they don't look that good and you can get the right steering column at any junkyard for 20-40 bucks.
Good luck and let us know which route you go...with pics of course
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2006 Jeep Unlimited
IMPACT ORANGE
1993 Chevy 2500 4x4 ExCab LWB 454/NV4500
Tow rig
1977 Ford F100 2x4 LWB 1st truck I owned, still have it!!!
1979 Ford F150 4x4 SWB
Built Ford Tough!!!
1971 Chevy Blazer 350 / SM465 / NP205
UNDER CONSTRUCTION Soon to have a LQ4 6.0!!!