No, the beds are not the same. The outside panels have a different shape. However, the beds are interchangable, meaning a Mazda bed will mount to a Ranger frame and vice versa. The rear bumper will...
check your heater core, it's behind the glove box. first remove the hose clamps in the engine bay - they're on the firewall on the left (passenger side). you'll probably lose some coolant, so have...