Just got to looking at this thread and decided to take a measurement on my 66. From inner fender to inner fender, like Brian showed I'm getting 40 and 3/8" My other measurements bolt to bolt on the export brace come in at 30.5" and center large hole is 33.75". The inner fenders are dynacorn one piece replacements, and they almost look like they slightly angle out. Wondering if that's why I'm getting a different measurement there than everybody else, or If I screwed something up? Been a year and a half since I worked on this part of the car, and now I'm freaking out that I messed up.