* Axle ratio: Different axle ratios were available, significantly impacting top speed. Lower ratios (numerically higher) are geared for towing and acceleration, limiting top speed. Higher ratios (numerically lower) allow for higher speeds but reduce acceleration and towing capacity.
* Tire size: Larger tires will reduce top speed compared to smaller tires with the same axle ratio.
* Load: A heavily loaded truck will have a much lower top speed than an unloaded one.
* Aerodynamics: While not as significant as in a car, wind resistance would still play a small role.
* Condition of the engine and drivetrain: A well-maintained engine will perform better than one that is worn.
Given the truck's intended purpose (heavy-duty hauling), its top speed was likely quite modest, probably in the range of 50-60 mph at best under ideal conditions. However, it's impossible to state a precise figure without specific details about the truck's configuration.
