'
W
W stuff Den also totally understandable why you're here!
Is the Plate # known or legible in pics also any chance it could help gain the Vin from your State Vehicle licensing group?
Long shot too but it may also be worth inquiring w/ them about past vehicles registered in your father's name?
Please share anything more you can as there's lots of great eyes/ears here who'd love to help.
If you're up for some reading, here's a great thread w/ member looking for another Minnimen sold Supercar, a '69 Yenko Camaro...
https://www.yenko.net/forum/showthread.php?t=139907
~ Pete
.