406 SBC with Vortec high performance heads, Hydraulic roller cam, TH350 Transmission. Front and Rear differentials from 1978 12 ton Blazer. 6 lift, New power brake system with front discs, Power steering, 35 Mudders, Has rust in cab corners and lower doors, Truck was originally 6 Cyl. 4 speed 8 lug 34 ton.