With the encouragement of @ceylonfj40nut and @CenTXFJ60, I've decided to paint my '71 FJ40 myself - going with Spring Green. Our niece just moved from Houston to San Antonio earlier this year, so a trip to Jimmy's barn would be a good trip for my wife and I.
For my '86 FJ60 build I swapped in the rear hatch from my '89 FJ62 donor vehicle. I had to repaint the hatch, but I figured it was easier than having to fabricate and install sheet metal to mount the rear hatch lock/actuator.
The FJ62 power window regulators bolt right up to the FJ60 inner door shell. For those upgrading an FJ60 up to FJ62 power windows, you'll have to cut a new hole into each of the FJ60 rear doors to accept the wiring harness.