I don't want any lift. Just need to replace my OEM suspension

OK I'm sure this has been asked before so be kind. I have a 2002 4WD with 90K and the suspension is getting soft. I put a lot of highway miles on my truck and don't do a lot of serious off road stuff except for getting into and out of some fishing holes.

The standard ride height and ground clearance have always been OK, I don't want to put on bigger tires, don't want to lower my differential but do want to get stiffer suspension and especially want to increase my towing capacity.

Any suggestions or links? I sure appreciate the help! Thanks!

 

Not too familiar with 1st gens, but I'll bite.

5100s set at 0 with a Wheelers 4 pack and call it a day. Decent set up if you don't want any lift. Just not sure what coils are out there that don't provide any lift besides OEM.