Drop Spring Question

[Toolman_69]

Hey guys I have a 69 c10 LWB. I'm currently doing a drop on the suspension and I'm considering my options. I am doing a 3/5 drop with a 1 inch block in the rear. I was wondering since there are from what I can tell only 1 vendor (cpp) that offers a 4 inch drop spring in a heavy duty configuration. Is the ride really rough(Bouncy) with the heavy duty spring in that much of a drop. Should I just go with a normal drop spring. I do want to occasionally use the truck for towing (Jet ski's, nothing really heavy), and the occasional load from the hardware store for home improvement supplies. Those who have done the 4 inch HD spring in the rear can you chime in on how it rides? Thanks