1970 NASCAR International Stock Car Racing Rule Book NASCAR Grand National Championship Circuit Section 20-9 -- Steering

a. Tie rods, drag links and component parts must be heavy duty.

b. Interchangeable pitman arms may be used.

c. Center-top of steering post must be padded with at least two inches of resilient material.

d. Racing type steering wheels allowed if approved by NASCAR.

e. No welding permitted on steering parts.