Does not matter what gauge you use. You can use steel or aluminum.
1/4" inch plate might look a little funky. But if bolted in place, any thickness could be used. If welded in, only use steel.
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.
