im running 33's right now and i dont plan on going any bigger
What lift is on it now?
If you are just looking to level out the truck, correct spring sag, get a little more lift, you don't need 3-4 inches, adding one or two springs from a Chevy(non 63" pack) in amongst your stock leave pack should do trick.
Toyota Main leaf
Chevy Main leaf (cut to fit) about 1/2 shorter on each side than the Toyota main
Toyota
Chevy (if needed, may want to do just the main, let the springs settle than add more)
Toyota
Don't cut the new center spring bolts until you are sure you have added all the springs you want.
The oem u-bolts are usually good for 1-2 extra springs, given the age of your truck you would want to replace w/new ones, if the PO put a lift spring on it already than the newer u-bolts are likely o.k.
To do all of the springs you will need two sets of used leaf packs, 4 new pins, a cut-off tool and grinder, and possible new u-bolts.
