B. 1933 – 1948

C. 1949 – 1957

D. 1955 – 1957 Chevy

E. 1958 – 1964

F. 1965 – 1967 Except Chevy

G. 1968 – 1974

H. 1965 – 1974 Chevy

J. 1975 & up

K. Camaro/Firebird

L. Mustang 1965 – 1973

M. Mustang 1974 & up

N. Corvette 1953 – 1967

O. Corvette 1968 & up

P. Modified Cars 1949 & up

R. Trucks – Stock -1973 & up

S. Trucks – Modified

T. Foreign

U. Special Interest

V. Street Rods Open

W. Street Rods Closed - up to 1935

X Street Rods Closed 1936 –1948

• All classes original except as noted (color changes, aftermarket wheels, chrome bolt-ons, seat covers are acceptable). Modified vehicles are those with alterations to frame, suspension, or sheet metal, or non-factory engine. The OBA reserves the right to change, delete, or combine classes, and to assign vehicle classification.