* Engine: The engine size (e.g., 351 cubic inch V8, 400 cubic inch V8, 460 cubic inch V8, or diesel options) dramatically affected towing capacity. Larger engines meant higher towing capabilities.
* Axle Ratio: Higher axle ratios (e.g., 4.10, 4.56) allowed for better towing performance on hills.
* Transmission: The type of transmission (manual vs. automatic) also influenced towing capacity.
* Truck Configuration: Options like a dual-rear-wheel (DRW) setup increased the towing capacity compared to a single-rear-wheel (SRW) truck. The presence of a camper shell or other added weight would reduce the capacity.
Therefore, there's no single answer. To find the exact towing capacity for a *specific* 1979 F-350, you need to know its engine, axle ratio, transmission, and configuration (SRW or DRW). You could try looking for the original sticker inside the glove box or driver's side door jamb (though this is often faded or missing). Alternatively, you can consult a 1979 Ford F-Series truck brochure specific to the F-350 or consult a Ford parts/service database, providing the VIN number of the specific truck.
