Thanks Bruce, one of the Jetfires with glue in has a lot of rust damage on the bottom flange too. Don’t see your pics but I know the problem. Lucky enough to get a donor 62 buick special sedan front section for the upcoming bodywork.
So Jim, that jells with our glass guy who thought there was a mid-year change not shown as 62. Wish I had one of those 63 parts books, not to mention an assembly manual !
Thank you everyone for the info.