OER Parts offers a wide selection of Rear End Components for your 1978 GMC K35. OER Parts offers 1978 GMC K35 Axle Shafts & Parts, 1978 GMC K35 Differential, 1978 GMC K35 Differential Covers, 1978 GMC K35 Differential Hardware, 1978 GMC K35 Differential Tools, 1978 GMC K35 Driveshaft, 1978 GMC K35 Driveshaft Safety Loops, 1978 GMC K35 Gaskets & Seals, 1978 GMC K35 Performance Rear Ends, 1978 GMC K35 Ring & Pinion Gears, and 1978 GMC K35 U-Joints and Parts.