To find the exact towing capacity for your specific E-150, you need to:
* Check the sticker: Look for the sticker on the driver's side doorjamb or the glove compartment. This sticker lists the vehicle's specifications, including its maximum towing capacity.
* Consult your owner's manual: The owner's manual provides detailed information about your van's capabilities, including towing capacity.
* Use the Ford website: You can use Ford's website and enter your vehicle's year, make, model, and trim level to find its specifications.
Without this specific information, I cannot give you a reliable towing capacity. Keep in mind that even with the same engine, different options and configurations will significantly alter the towing capacity.