Just a little further clarification on the chassis number. My experience is that the VIN is closer to the radiator support than the firewall on the upper part of the rail. The VIN's are stamped very shallow and may not be visible if the frame is rusty or if the rail has numerous coats of paint. If your lucky, the number for the body is on a plate attached to the right side of the firewall. More often than not these plates are missing.

When titling a car, it will need to pass a vehicle safety inspection. This inspection will require you to show that all necessary equipment (lights, wipers, etc.) is operational. These inspections will either be done by your DMV representatives or by the State Police. They will want to see the stamped VIN on the frame rails.

Now this can pose a problem. Most states will not title a 'frame'. The vehicle has to be operational. The second problem is not knowing the VIN history prior to rebuilding the car (if necessary). The worse case is that you spent your money on a stolen car and the vehicle is impounded and you lose your investment. I would suggest doing a title history with your local DMV. As mentioned, make sure you have a bill of sale.

And finally, after you've run through all the hoops, have a VIN plate made. These are usually available thru Ford restoration suppliers. Don't try and make the car somethings it's not. The frame VIN doesn't lie. The reason for the plate? If you ever have to make an insurance claim, the adjuster will be looking for a VIN plate first and a stamping if no plate is visible. Companies can and will deny claims when VIN's do not match the numbers on the title or policy.