Mo Pix & Direx
Easiest way to get the fixed quarter windows out: go to an auto glass shop. Otherwise, you have to work the gasket lip from a corner on the inside - top rear is best since it's the largest angle. I prefer a "hook tool" & a "bone stick", but my guy Chuck (who really did this job - I just helped) doesn't like hooks (something about stabbing himself in the face once too often) & just uses the bones. Pushing from the inside & working the gasket back & forth the corner will start to move outward. Don't worry about breaking the glass - it's tempered. Only chance of doing that is if it falls out. But you're not going to stay inside pushing until that happens. Once you have about 6" loose each way from the corner, go outside, grab the corner, & start pulling. You may have to go inside to help it along, but once it starts it's easy & gradual from then.
With the fixed window out, trim back the headliner anywhere it overlaps the pinch weld (the vertical surface the gasket was lipped over) too far so you have about 3/8" clean. Wipe the vertical mating surfaces with a strong solvent (we used acetone) & apply 1/8x3/8 butyl sealant. I got mine from McMaster-Carr 'cause the only I could get it from my normal suppliers was to buy a case. I haven't seen this size but a couple times in 17 years in the auto glass biz.
Pay attention to the rubber blocks that may have been stuck to the bottom of the Aussies - you'll need them or something else to space the bottom of the frame away from the body of the truck so the drains will work. Mine got thrown away so we just used 1/8x1x3/4(about) pieces of "setting blocks" held to the frame with butyl tape.
Apply the butyl tape to the vertical pinch weld, starting at the middle of the bottom & continuing in one piece. Line the window up, stick it in the hole, & you're ready for the trim.
I put the "grabbing lip" of the McMaster trim towards the outside of the truck so the inside wouldn't have a gap where it meets the headliner & the plastic liners. Start in the middle of the bottom, below the division bar. The thickness of the pichweld varies (by how many pieces of sheet metal are pinched together & welded) so be careful to get the U over all the pieces before you start pounding on it. I used a rubber mallet & a piece of 2x4. Turn the 2x4 sideways in the corners so you can more closely follow the curve. I used aviation snips to cut it at the end but it seems to sorta splinter, so cut it long first.