I just ditched the TH400/205 combo in favor of the 465/205 with plans of a doubler next year! You can't beat the "low" gear on the rocks! 6.71 compared to 2.41 IIRC with the 400... that and I don't have to worry about over heating the auto anymore in the mud and muck out here! Auto's slip nasty when wheeling hard on em - when they overheat.
Besides, I like 3 pedals better than only 2! /forums/images/icons/laugh.gif BTW - peek up under the dash, next to the brake hanger... you may already have provisions to hang the pedal. That means only one bolt to put in to hang it!!! That's what happened to me.
And as for the driveshaft question... you will probably have to lengthen/shorten your shafts as stated above.
As for the hydro - if you don't plan to go hydro, leave the auto in! It makes all the difference!
Finally, Rene's list looks pretty close to complete to me! The only other thing left out so far that I noticed, is that if you plan to keep your auto column, you'll have to pull the shifter which is only one pin short of falling out... /forums/images/icons/wink.gif
Last but not least, check out my webshots for the pics of the 465 I rebuilt. The trans I am using needed a new output shaft... only took 3 days, and the help of the folks here to get me thru it! /forums/images/icons/blush.gif /forums/images/icons/laugh.gif
-Dan