Control arm issues

Bought the duster 2 years ago. It was supposed to be a parts car for the demon. Well that changed. Now sports a warm 440 and 727. Fun car but we have an issue. The passenger control arm mount looks to have been modified in the past. Nothing looks to be from an accident. Car was an ex drag car. Clean. But like I said the control arm. I'm wondering if someone can get me some measurements from their car so I can cut and reweld the mount. Picture is of the arm completely adjusted outward. Thanks guys. Trying to get it ready for a show in Wisconsin dell's this summer.