It dawned on me that I do drive a 69 Grand Prix which is probably more similar. It hasn't been cut on. Looking at this, you can ingore my comment about the brace being whacked. Looks like thats how its made on the intermediate-sized body. The brazing could be GM, seriously. Or a repair guy. Either way, it will grind off and you can get it out of the way. Here are flash pics from through the quarter vent hole looking down. Perhaps they will help. I needed to screw the regulator back together anyway!