Don't I know it. I had to install back seat belts on the '65 Monza hardtop. Family of four you know.... one for each door. Stephen Date: Sun, 3 Apr 2011 23:04:00 -0500 From: "J R Read" <hmlinc at sbcglobal.net> Hi Carl, FYI - front (lap) belts became mandatory in US in 1965. Rear belts in '66. Later, JR