been a while since i've posted...
BUT - I changed front and rear to Ranchos, big BIG difference in my truck.
I was able to compress BY HAND my old factory shocks, pathetic.

FYI towing in this truck is horrendous (well my truck at least) without some type of suspension mod - a large size pop-up camper with a tongue weight of around 300 lbs pulled my muffler into my drive train, unusable for towing

 

Yea, buddy!

 

I put on a set of vatozone spring helpers in the rear. Just one set is fine on the back half of the leafs. 1000lb increase in towing capacity made all the difference in the world. I have towed a 6000lb package with my ST and never had any issues. With the spring helpers, I can put four 60lb bags of sand over the rear axle and my ride height sinks by 1cm....yes, I actually measured it.

 

Then Vatozone spring helpers it is for me - Thanks!!