Welcome mr. Chevy. I don't believe there is any kind of list for the JL-8 cars. There were only 200 or so made. Paperwork would be important. I would get notarized letters from the two owners that you have contacted stating that the car had 4 wheel discs when they owned it. Also search for the original owner and order the shipping documents to find the original dealership. They may still be around, or a salesman may remember the car. On a side note, my 69 z-28 is also an 05A car. My vin is 9N639XXX. Is your engine casting an 010 block or a 618 block. A couple of us 05A guys are putting together casting numbers and date codes from various components I.e. Head casting dates, YHwheel dates, block casting date and casting number. If you could supply some of these numbers, it would be greatly appreciated.