I’m confused. If you do a 2/4 drop, it makes the truck level because the rear has so much rake. You did a 2/4 drop, and then added 2” back to the rear. It should still be higher in the back than the front. At least that is what I’m thinking.
Call Steven at Timber Grove, tell him what you are trying to achieve, and he will help you out. Best customer service in the business and he is always willing to take the time to speak with customers. I‘m using his 4” drop coil replacement bags and I’m happy with them. I recently loaded up about 800 lbs. of concrete bags, bags of rock, and some other items and simply aired up my bags to make the rear level. The bags will support up to 6k lbs.
This might work for you.
Stainless steel adjustable design that accommodates leveling the rear axle to the factory front. Kit includes stainless mounts, 6,000 lbs. air springs, stainless fasteners, composite push-to-connect air fittings, twin air fill lines with brass barbed air valves and axle limiting chains. If a TGE Air
timbergroveenterprises.com
This is another option, but you have to add air first to keep the truck from squatting. They expand inside the coil spring to keep the spring from compressing as much. I’ve had them before and did not like them. I felt the ride was too stiff and I couldn’t raise and lower the back of the truck with them.
Air suspension kits and air ride suspension kits (also called air bags or air springs) from Air Lift help with towing and hauling with safety and comfort.
www.airliftcompany.com