1966 NASCAR International Rule Book Specifications NASCAR Grand National Championship Circuit Section 20-2 -- Bodies

a. All cars must have complete bodies, hoods, fenders, bumpers and grilles in top quality condition.

No aluminum, light alloys or fibre glass will be permitted as substitutes for steel for any parts of the bodies or bumpers.

b. Cars must be neat appearing. Head lining may be removed, and if so, inside of top panel must be painted aluminum or white.

c. Bodies must not be cut, altered or lightened. Floors must be complete except for tire inspection windows; no tunnels or air ducts. Engine firewall must remain standard. Spare tire well may be removed but hole must be covered with metal and welded. Cars must weigh no less than as specified for each class. Any weight added to the car must be located within the body shell.

d. Chrome and other parts may be protected with masking tape. Chrome mouldings may be replaced with chrome tape.

e. All doors must be fastened in an approved manner. Cars must have doors bolted with not less than 3/8 inch bolts. Recommended method, see rear pages of this Rule Book.

f. No streamlining allowed, such as headlights, radiator grilles, top of windshields, under pans or gasoline tanks. Cars must remain standard in appearance.

g. Fenders may not be cut or altered.

h. Hoods must remain in original locked position and closed. All hoods must have a positive fastener on right front, left front and center.

i. Hoods and rear deck lids must have operating original type hinges.