are you saying the truck was original with a diesel and 5.29 gears
most of the time those 6 speeds are direct drive as well, so that truck would have been all out pegd rpm wize, at some where "around" 53/63 mph peg out speed
not good for mpg in flat land!
if you have on board air and tools in the truck
taking the wheels/tires off the jeep "after its on the trailer" would lower the air drag "for the long drive". the jeep would drop nearly 9"/12"
if the truck has 24.5 rims you could go to 22.5 rims with lower profile tires to make space to lower the truck a little, possibly go to 19.5 rims but i don't know if it would clear the brake drums. as to if it whould make 3" of clearence for lowering the rig
maybe, maybe not
the gearing change would more than make up for the shorter tires.
but as stated realer thats a lot of work/cost to lower it.
maybe if theres a spacer in-between the box and the frame rail it would be better to lower the box closer to the frame, than try and lower the leaf springs???
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1 86 T\D trooper with rare GEN 3 rods
TRANS FIXED NOW DD
1 86 4WD 5sp pup is 2.3L gas, but plan on 2.2L diesel repower
1 91 trop, long term plan is a group buy of imported Isuzu 4JB1-T 2.8L I-4 engines, hoping to get price down to 2K not 3K plus
1993 sidekick my MPG toy, epa rating 26.
i get 29/31 with stock drive train.