Rear Load Suspension Question

[benw88]

Hi Everyone,

I have been building by 68 C10 Stepside since I was 15, I am 20 now and have accomplished a lot. Recently I Fabbed brackets and mounted a 68 GTO Posi and also installed 2in lowering springs in the rear. I occasionally tow a trailer and load dirt bikes in the back, I want to maintain my current ride height and not have the back of the truck squat to where the rubber stops touch the Axel. How do I accomplish this? Air bags, air shocks ? any suggestions will be greatly appreciated. I am trying to make this happen as cheap as possible because I rarely tow, however, when I do I want it to be proper for when I do. Also College isn't cheap hahaha