Are you sure we weren't leading parallel lives? I ended up with the 5.0 Mustang, with the powerful version, BEFORE they detuned them some in Feb. '79. Mine had come off of the floor, before Uncle Sam said they were too powerful for street cars. They then began using the version that I had in the police interceptors.
And my old QH gelding was faster than anyone else on the short run, and across a pasture!
Funny about you taking the mowers apart. I don't remember any of ours wearing out, due to dad's maintenance of them. I was always under a car or on a tractor with him, doing whatever project he was working on, even from toddler stage! Not something mom was happy about, but dad was happy to have the help.