I don't believe that I have ever seen a '32 Ford BB, or for that matter, an Early Ford V8 1ton/1-1/2 ton truck with an aux OD trans and/or two speed rear end.. Of course many of the old time "farmer" type mechanics, were very good at adapting aux transmissions into the drive-lines of light trucks..
In the early '50's I worked for a shop in a small farm town in Idaho, the owner was very skilled at modifying trucks to give them more power and/or more speed.. We used regular 3 speed transmissions, sometimes mounted frontwards, sometimes backwards to either speedup the gearing and/or reduce the gearing..
In the early post WWII years, modern, i.e. new trucks were very hard to get, of the ones that were available, most of them were badly underpowered with small six cylinder engines.. Studebaker and Dodge were the worst.. Of course the Fords were not much better because the V8 was strictly an RPM engine, very poor low end torque..
Farming in the years following WWII was quickly becoming automated, tractors and combines were quickly replacing horse drawn plows, etc..
I remember one '47 Studebaker were modified with an aux trans.. With the hand throttle set at about 1,800/2,000 RPM the truck would "pull", in a plowed field at a speed less than a normal mans walk.. The truck was used to harvest spuds... Potatoes to you city people....