Details: From Schwartz Performance Inc. NOW AVAILABLE! Bolt-in modern high performance full-length chassis for 1955, 1956, 1957, 1958, and 1959 GMC & Chevrolet pickups: Chevrolet 1/2 ton short bed GMC 1/2 ton short bed   Our full frames for 1955-1959 Chevrolet & GMC Series 2 pickup trucks fasten to the cab & bed the same way your stock frame does. …