OK now i'm really confused. I followed directions I found using the search function to drill and brace the holes. I drilled out where the factory dimpled the floor. The outside holes I drilled, lined up with the holes in the braces that come off the back side of the rockers. the inners were drilled at the dimples and I welded in the bracing plates.
Center to center, I got 12 1/2" side to side on the drivers floor, the passengers floor was 11 3/4" side to side. I didn't think Ma Mopar was this bad with tolerances.
