Will a Chevy truck cap fit Ford truck?

No, a Chevy truck cap will not fit a Ford truck. Truck caps are designed to fit the specific make, model, and year of the truck bed. Even within the same brand (e.g., different Chevy models), the bed dimensions can vary enough to prevent a cap from fitting properly. The wheel well positions, bed length, and overall dimensions are usually different enough to make them incompatible.