crank your bars, put in 3/4 or 1 ton bars and crank less than the 1/2 tons, body lift, rcx makes a torsion bar lift kit but its a waste of money. id go a 4" if you wanted to keep ifs otherwise do an SAS.
body lifts i wouldnt recomment, your bed wont have as much weight capacity.
as for the rear you can use blocks, add a leaf, 1 tons and 3/4 ton rear like 5-7 pack leafs ive seen help a little. if you want it to not squat while towing then some helper springs would work, bags probably wouldnt be worht it since it doesnt tow everyday.