I have unearthed ownership details of my 1960 Plus 4 back to 1962. I tried every avenue, however unlikely it seemed, and followed every lead. I also had a couple of very lucky breaks. The guy I bought it from, for example, bought it at a show in 2010. I contacted the show organizer and he still had registration records for that event and shared contact information for the owner of the only Morgan there. We corresponded on email and he led me to the guy he'd bought it from (on eBay). The guy who rebuilt the car in the 80s died in 2014 but his online obituary listed his kids, and I was able to Google contact info for one of them--who turns out to be a pistonhead who helped his father with the restoration. He was delighted to reconnect with the car and a fount of information about what was done and why. My research took time and persistence, and will never end, but you have to start somewhere, as you already have. Good luck.
Last edited by JCK; 10/08/21 10:19 AM.