Thank you, good people for all your kind words. The A3+ test dye prints have been framed and shipped off to VFP, with hints that he might acquire a few more ppi in the (flatbed) scanning department. With spot removal. The images are irreplaceable, given that the subjects are now mostly deceased, so we must wring what we can from the negs.
I also have my own irreplaceable 35mm negs from 1958 up to the digital camera age. I agree that we need to get what we can from these images. In addition, I have family 35mm color negs and slides from an uncle (now deceased) that go back to the 1940's. The oldest ones really require an upgrade in my scanning software to even come close to a good print result. Another project this procrastinator will put aside for many rainy days (which California woefully needs!)