Half ton trucks swapped over to Bendix brakes for 1951. It took a little longer on larger trucks. I'm getting my info from the Vehicle Info Kits. Here's a snapshot of the 1951 Chevy Truck Vehicle Info Kit brake page.
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.