Does anybody remember mobile engine overhaul outfits?

A local parts store had one here until the the big box stores bought him out in the mid 80's, he would come out and bore one cylinder if that is all you needed.
And it would work to get an old tired engine going again.
These guys came from a time, that an engine life span was only around 50,000 miles if you were lucky, but the big three figured out how to make more reliable engines.