Let us know how you make out. I would love to find my fathers original 69 dart swinger, yellow that was purchased in Toronto new, but without a vin I think it will be near impossible.
Just got back from Fla, am going to do some serious searching shortly. If you know who he was insured with, they might still have a copy of his policy(VIN). If he borrowed money, try the bank, again VIN. Just a start for now.
