If I were to put 5100 series shocks on the rear of my stock ride height truck, would it hurt anything?

 

Those should be for 0"-1" of lift, so they should be fine for stock height.

 

????????

 

Not sure what you mean. As long as they are the correct length for your stock ride height, which you can confirm by looking on their web site or calling retailer, and teh guy above says they are, then they will improve your ride and handling.

 

snowmanick and I posted at the same time so you can ignore the "?"'s ,
I'd just like a little more control of my rear suspension before I get a rear sway bar.

 

Per Bilstein's site these will work fine for a stock height truck.