The Stooges hung out with the MC5 and were often their opening act.
The MC5 sometimes referred to them as our "baby brothers."
I was a youngster (well, younger than JC, but not much) during that time in the Ann Arbor/Ypsilanti/Plymouth/Livonia area. You'd see those two bands on the bill often.
My favorite memory of the MC5:
In the early 70's my band was the house band (every other month) at a rock club in Ypsilanti. When big acts were in town we were the warm-up. The PA was ours. Part of the PA were JBL 2395 slant-plate horns. They worked great for shallow but wide rooms - smooth and nice dispersion. They looked like this:
We found (by trial/error) that we needed to watch what we were sending to those horns. The drivers didn't handle a lot. Mentioning this to the MC5 sound-man, he assured us he would be careful. There may have been some hearing loss involved (understandable, they were a LOUD band) as he desired more and more high frequency sound - the driver diaphragms blew during the 3rd song.