Drag Shocks for a 72 C-10?(with 73-87 suspension)

[chevy72blu]

My 72 C-10 has 73-87 front sus. and the 3rd member/leafs out of the same truck. I recently pulled the overload leaf springs out of the rear to set it down an inch or two and make it ride a little softer. However, I discovered that my rear shocks are entirely worn. I want to replace them with a set of 70/30 adjustable drag shocks. Does anyone make them for my application? If not, what has to be modified in order to do so?


Or, can someone else recommend a good shock which will really squat on launch?

Thanks!