... 1500, C1500, G1500, P1500, R1500, V1500, K1500, G1500 series & Safari, Truck 3/4 Ton 150, 2500, C2500, K2500, P2500, R2500, V2500 series ... 70 series), 4000, 5000, 6000 & 7000 series [REAR WHEEL][DIFFERENTIAL] (1955-88) GM Truck 1 Ton 250, 300, 3500, C3500, G3500, K3500 ... , C1500, G1500, P1500, R1500, V1500, K1500, G1500 series & Safari, Truck 3/4 Ton 150, 2500, C2500, K2500, P2500, R2500, V2500 series ...