We have 3/4 ton drop springs for front or rear available. You'll find them on the following page of our web site
http://www.gmcpauls.com/lowering_springs_&_parts.htm
Part# 4145732 $129.95pr are our rear 3/4 ton drop coil springs, Part # 4145722 is for our front 3/4 ton drop coil springs.
The springs take on avaerage 3-7 days to ship from time of order because they are custom wound and tempered here in the USA for the specific truck they will be installed on, with spring rate & rating detemined by your trucks specs. We supply the following info to our manufacturer to build your springs
#1- Year
#2- Model ( Truck, Suburban, Blazer, Panel Truck
#3- Ton Rating
#4- Wheelbase Length
#5- Motor Size
#6- Transmission
#7- A/c or Non-A/C
#8- Bed Style
#-9 Drop Height Desired
They then determine the vehicles weight based on this info and custom wind and temper the springs to your truck, after tempering process they are again checked to make sure they a matched set that will provide the same ride and spring rate painted, boxed and shipped to the customer. Overall it generally takes 5-10 days from time of order until the springs arrive at your door.
GMCPaul