I think you'll be fine with the 22 gauge metal. It's a bit thinner than what was originally used, but not enough to make a real difference in my opinion. I don't think the hinge pockets really add much structural strength. The earlier trucks had an additional hinge bolt back there, but Chevy apparently eliminated those bolts around '50. The originals were probably 19 gauge (0.042"), so your 22 gauge isn't that much thinner at 0.03".
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.
