ok here goes...
Do the pedal assembly first. That was by far the most annoying and frustrating part of the entire swap. I swapped the pedal assembly out first so that i could break up the project into 2 days and still be able to drive the truck if i needed to.
When you remove the transmission cooler and lines, they puke A LOT of tranny fluid. Make sure you have containers nearby to get all the fluid that drips.
Take your time when you are drilling into the floorboard. Use the rubber grommet piece as the template when you make your cuts. Make the hole about 1/2" smaller all the way around so that the screws have enough meat to grab on to.
I just cut out a hole about 1/2" larger than the shifter and looking back i would have made the hole bigger.
Is your truck lowered? I had to to completely cut out the carrier bearings steel bracket so that the 1 piece drive shaft would not come into contact with it.
There is a dowel pin on the bell housing. You have to swap it over to the other side. I cant remember if its left to right or right to left.
On my truck even though it was automatic, had a brand new pilot bearing installed in the crank- so that was nice
Otherwise, dropping the automatic and installing the T56 was pretty straight forward. The automatic is HEAVY! you will need 2 people or a lift to drop it. The T56 is pretty easy.
Good luck with the swap. Feel free to call or text me if you have any questions.