Truck Shop has reverse eye main leafs for around 40 bucks a peice than pull 2 leafs out. Those were way over sprung for todays roads and loads. Just make sure the shocks have travel and dont bottom. You have a sway bar i bet so you will be fine.
Shorter tire,reversed mains with 2 leafs gone will get you close. Becarefull using aluimn blocks. You would be better to make new perches out of 2x3 tubing.