If you want, check out my pics of my race truck and get an idea of whats involved in chopping one of these trucks.
My truck has a 3 1/2" chop which means I took 4" out of the front post.
I have never done one at 2" but the same principle works.
I always tack weld the door in place or some tubbing to keep the door opening correct befor you make any cuts.
I cut the top section of the door off first about 1" lower than I plan to cut the cab, so you can get at the area to weld the cab back together and then after the cab is welded back together I fit the door top pieces like a puzzle.
you will need to cut across the top from door to door and make a filler piece(on a 4" chop about 2 1/4")
I would guess with a 2" chop you might need to add about 1-1 1/4" across the top.
Or you could lay the windshield post back and the top section forward, it is harder to it this way but it can be done...
If you want to talk about how I chopped mine send me a PM and I'll give you my phone # Ron.....
link here:
http://rides.webshots.com/album/559598861LBwiIz