To start with I've got an '86 C/10 Silverado W/ the heavy duty brake set-up on the front(larger caliper/rotor) and the heavy leafs in the rear, I believe this is part of a towing upgrade package?
What's the compatabilty of C/10 to C/15 as far as trailing arms and what-not?
Because........... Rancho only offers a 1 1/2" spring/spacer kit for 73-87 2WD C/10's, but has a 4" kit for C/15 2WD's including bolt on lower cage,spindles,springs,brake hoses, and U-bolts/blocks for rear.
I know about Fabtech's 3" basic spring/spacer kit, but I fear this will just eat ball joints.
Can the C/15 parts kit from Rancho be fitted to the C/10

??
Hmmmm.........