all my C&V bikes have Rigida rims on them. I used to prefer Super Champion, but for some reason my boss didn't feel like ordering them. I have some of the 1320 rims that I have ridden for 30 years and they are still in good true. Finally broke a spoke last year, but the wheel just trued right up again. I would like to retire them from daily use, but I haven't gotten around to replacing the wheels yet
I don't think that I would ride one that had been straightened though. Maybe around town.
If a rim has a ding on it, it means it was ridden with low pressure in the tires or hit something really hard. I hardly expect any rims from the '70s to hold up to that sort of thing.