Thanks for those measurements! Are the Spring eyes all 35mm (1 3/8") in diameter?
If so, the Rough Country lift is at a good price for me to get and then swap the bushings.
Looks like SOR has some with the 18mm center for the pins.
I recently went down a similar road since I have an 81 also. After figuring out the spring eye bushing size issue, I went with the ProComp 2.5” Lift springs, factory new rubber bushings, Cool Cruisers HFS Shackles for the FJ62 series which are offered in a 1.5” over stock length for the front and a 2” over stock for the rear which should yield approximately 3.25” in front and 3.50 in the rear. I may not even use the lift shackles in the front. For shocks I’ve purchased Bilstein 5125’s. I’ve pieced it All together but all new for about $800. Just need to pull the trigger on UBolts. Obviously I’m in no hurry lol