I would think that would be very difficult to quantify.
The Depot Hacks left the assembly line as commercial chassis without a body and then a whole bunch of other companies (Springfield, Hercules, Martin Parry, and others) made the bodies. Some customers probably made their bodies too.
For example, I have a '28 AB Canopy Express. It is considered a 1/2 ton truck. The chassis was built by Chevrolet (it's the same as the AB car) with a single piece firewall/dash and then the Hercules Body Company built the Canopy Express body for it. So, I suspect that my truck might be counted as a light commercial chassis somewhere, but probably not counted anywhere as part of the total number of Canopy Express' built that year.
Dean
