On the rear of your 2wd the spring hangers sit up higher on the frame, the 4wd trucks the hangers extend below the frame, so there is a big difference in height. Looking at the front of the C30 it appears the craddle would go and a 4wd engine crossmember would go in. Then the tranny cross member would have to go. Then you'd need an tranny/tc adapter cross member. Then the tc to frame mount. Not sure where the tc would be in relation to the 2wd frame bowing out, and whether or not that will cause problems. I'm not sure when you want to start but keep looking for a 4wd chassis.
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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
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