Here is our best guess based on the information provided by the Facebook post:
1968 GT500 / Matches information below
White top - confirmed by photograph / Matches information below
Convertible - confirmed by photograph / Matches information below
White exterior - confirmed by photograph / Matches information below
Black interior - confirmed by photograph / Matches information below
4spd - currently no matchNo AC - believed from photograph / Matches information below
From Windsor, ON, CN -Dingwall Ford decal on rear valence above LH tail pipe / Matches information below
Built after 2/15/68 - confirmed by photograph / Matches information below
Car can not be a GT500KR, do to information provided in photographs.
Dingwall Ford sold 14 new cars in 1968 according to Shelby Club records.
They only sold one white, convertible to Roy J. Merlo (Windsor, Ontario, Canada). It was Vehicle Identification Number 8T03S173645-01995.
This car was an automatic transmission car.
We believe: Its most likely this car was purchased "used" from Dingwall Ford by the Facebook poster's father.
This car was last seen in Indiana in 1989.
This information is a collaboration of Mr. Paul Orr, The SAAC / Vinny Liska and Coralsnake. Also assisting forum member "KR Convertible" It did not come from a Facebook Group, Barrett-Jackson, Marti Autoworks, The Canadian Ministry, Shelby American, a private investigator or any insurance companies.
Those are all great resources, just not for finding lost cars.
If anyone knows the current disposition of car # 1995 Mr. Liska would love to get an update on that car.