Chevrolet 1965 CORVAIR Owner's Manual page 31

SEATS
• Adjust the front seat fore and aft by means of the
adjuster handle shown. Lift handle up to move seat.
• If desired, the seatback may be adjusted to lean
farther forward or backward by means of the bolt and
the lock nut shown.
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• Adjustment of the seatback lock determines whether
the seatback will be rigid or will fold forward. With
the seatback lock in the down position, the seatback
will not fold forward.