Looks good. Couple tips/suggestions:
1) As you complete your build, try to find ways to keep weight on the rear end, to keep it balanced, and for the rear to have traction/flex. Spare tire, spare parts, etc, I saw a major improvement in my old Toy after moving weight to the rear.
2) Plan to do some frame plating soon. Those interior rails just before the rear spring hanger are known to rot from the inside out and yours look to be doing so. Get a hammer and chisel, and start hitting that rust and it'll probably go right through the thin interior walls. I had two trucks (and 85 and 87) completely snap in half right there.
3) If you want to upgrade to the SR5 style cluster (factory 6 gauge with speed, tach, oil, volts, fuel, and temp), let me know, I have two of them in my garage, including the stock oil pressure sender needed for the gauge to work right...