Wow, could be, as it's a 7a. If it's any help. the chassis no is BT7A-IC-1-63, and ORC list its current location as England.
That Barry Thomasen crash happened almost at my feet, he spun coming out of Rothmans onto the back straight, the car ran off onto the infield, it hit the bank and flipped, and as it went over he was half-thrown out of the car, with the car landing upside-down and him still half-out. Clearly no belts, and I think this was the last season they weren't compulsory. Very sad.