My contribution---
About 4 PM on New Year's Eve in '64---it was just getting dark---I started out toward Indiana from Metro Detroit. I was driving my '54 Customline, into which I'd swapped a 312 with the factory 'Race' dual quads and home-built headers. The cam was a B7A-6250-C (the 'blower' cam) but I hadn't put the blower (VS-59 Paxton) on yet. The trip, in those days, was mostly 2-lane road, and I had to drive through the middle of Ann Arbor. I was going to see my girl and go to a New Year's Party.
I got close to the U of M Campus and lost a cylinder and heard ugly noises. I pulled into a convenient parking lot close by, and ran across to the door of Varsity Ford---at that time still in the middle of the University District. The door was locked but there were still a few lights on inside. I banged on the door and a guy came to tell me they were closed. I told him I was traveling and need a part---a rocker shaft---and he told there was no-one from parts there and he was the book-keeper. I told him that if he'd let me into the parts department, I'd be able to find the part. HE LET ME IN!!! After a bit of wandering, I found the shaft in its cardboard tube. He wanted to go home, refused my attempts to pay and told me to come back after the holiday to take care of it. We walked out together and he locked the door.
I went back across the parking lot and talked myself into a stall in an open gas station/garage close by. They agreed to let me use their hand tools. (It was snowing heavily and blowing, to boot.) I pulled the driver's side rocker cover---Cast Aluminum Thunderbird---and, as I thought, the end was broken off the rocker shaft.
I pulled it all apart, keeping track of the pushrods and rockers, and re-assembled it all on the new shaft. Put the cover back on and started it up. I didn't even have to lash any of the valves. All was serene. (I'd never had the experience of breaking a rocker shaft before but that was what the noise sounded like to me---I had built the engine from a bare block, so I knew what was where.)
I pulled out to a pump and got a fill-up. They wouldn't even accept money for the tools and a warm place to work. I continued on to Indiana and when I got there... But that's another story!
KS