A 1953 Chevrolet 4100, or 4400 series 1 1/2 ton truck, would have came standard with a 216ci. Thriftmaster 6 cyl. engine. A 235ci. Loadmaster 6 cyl. was optional. 1953 Chevrolet 6100, 6400, & 6500 series 2 ton trucks, came standard with the 235ci. Loadmaster.