I measured two different cars and came up with two different measurements
(1) '87 Monte Carlo SS. 52 3/4" center of lower inside bolt to center of the only bottom bolt
(2) '84 Cutlass. 53"
Hope this helps
(1) '87 Monte Carlo SS. 52 3/4" center of lower inside bolt to center of the only bottom bolt
(2) '84 Cutlass. 53"
Hope this helps