1960-91 - B, C, P, and S-Series - Helpers
B, C, and S-Series Conventional Cab; Rear Single Axle; Helpers
P-Series Forward Control Chassis; Rear Single Axle; Helpers
C40 through C80, including "High Cab" Kodiak/TopKick
1960-1990: Includes 1990 for model year carry over only.
S40 through S70 and B60 School Bus Chassis
1960-1991
P40 through P60
1965-1990