Yes, it seems that the world is held together by 5/16-18 bolts. That includes the fender to cowl attachment. The holes are larger to allow some adjustment. If you try to use larger bolts, you'll likely find that most of them won't line up.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.