My friend bought a "1986" square body that has been chopped a couple times. The frame is an unknown year. The motor is a 1978 350 bored to a 355, and the cab is off of a 1986 that was a 2wd 305, rear axle is a dana 80 with a 4:35 ratio, the front I believe is a 12 bolt with 4:35's as well...