Mine is 82 and had pour in just on the outside sections. Still a b.
I had no corrosion but others have had, not sure what conditions lead to that.
Here is my thread, longish and I like to talk to myself but should be able to skim for the highlights...
Mine had a pretty good 40 year life still needed a bunch of work but I did it and know it should be (mostly) ok. Unless you jump up to a much newer and more expensive welded you are in for work.
Scott is optimistic, again age and avail help and area to be worked on dependent:
Floor out, one...
Had not seen that until now and while David gives me a different kind of chill bumps, for me it it the audience interaction of Freddy that imo no one else ever had. That is a wireless electric energy that not sure will ever be duplicated.