In every neighborhood, there is a good old mechanic who works on cars of any vintage. I know where they are on the 78 corridor, have no idea further south.
When my mechanic kicks the bucket and I have to find a new one (has happened a few times), I’ll use my crappiest vehicle as the guinea pig when trying out other places. It usually takes me 2 or 3 tries before I find a mechanic I like.