Just saw this thread and thought I would chime in. I'm with you on the lowered trucks (not for me). That's the beauty about these trucks... there are so many options. Check out my picture link below. When I did front disc conversion I changed out the front springs. I installed some HD springs (P/N 2772074) bought from NAPA. Tires do not rub at all. They are 285/70-17 tires with H2 Hummer wheels. The ride is a bit stiff, but hey it's a 3/4 ton truck. Here's a comparison of the springs:
The stock HD C20 springs are as follows:
http://www.napaonline.com/Catalog/Ca...752_0162319756
Part No.: 2771752
No. of Coils: 7.92
Free Height: 12.94"
Spring ID: 3.68"
Spring Load Height: 10"
Design Load: 2950
Spring Rate: 1016
Wire Diameter: 0.812"
The springs I put on from C10, C20, C30 from 1973-83. They are as follows:
http://www.napaonline.com/Catalog/Ca...074_0162301536
Part No.: 2772074
No. of Coils: 8
Free Height: 13.61"
Spring ID: 3.676"
Spring Load Height: 10"
Design Load: 3841
Spring Rate: 1060
Wire Diameter: 0.83"
You could also use C30 mid '80's 1-ton springs, but I thought they would be too stiff. Those are:
http://www.napaonline.com/Catalog/Ca...085_0162304063
Part No.: 2773085
No. of Coils: 7.93
Free Height: 13.34"
Spring ID: 3.65"
Spring Load Height: 11"
Design Load: 3289
Spring Rate: 1318
Wire Diameter: 0.906"