I had a friend who took his car to an oil shop in Michigan. They drained oil, changed filter, and lubed. This is not your everyday car. It's a 1966 442. He made it 5 miles down road, motot went. NO OIL. They drained and didn't fill. That cost them a lot more then $6,000.00
I never heard of a oil filter blown off a car. Have seen them come off because they were not installed right.
I think you are going to pay on this one. But with the age of the car, it's not worth $6,000.00. You can buy a 1998 for that.
Get a hold of GTP DAD, he has worked for GM a long while. He would know about past problems. Good luck