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**JIMs70GMC** · 12-05-2004, 11:51 AM

Can't use the 73 and up springs. They are 3" longer and would require some mods to the spring hangers.
As far as the 3/4 ton gear, the front will bolt in and you can use the 1/2 ton calipers. In the rear you will need to move spring perches and shock mounts on the axle, unless you can find a 3/4 ton rear from a pre 73 truck.

12-05-2004, 11:51 AM	#2
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	Can't use the 73 and up springs. They are 3" longer and would require some mods to the spring hangers. As far as the 3/4 ton gear, the front will bolt in and you can use the 1/2 ton calipers. In the rear you will need to move spring perches and shock mounts on the axle, unless you can find a 3/4 ton rear from a pre 73 truck. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm