Reason is either misalignment or worn hinges. Remedy; 2 people. Loosen the 2 bolts on each side of the hinge to the fender well. Lift the hood up pushing against it while it's fully opened. Tighten the 2 rear bolts up first the closest to the windshield and then the other 2. Should solve the problem.
Paul Winvoices.
Experts in reproduction documentation for the 1959-1988* Chevrolet line. Please visit our website: http://www.winvoices.com * Restrictions apply