It was in the 1950's when I was a young boy looking at the hydroplanes at the Toronto Hydroplane Club [same place where TORC holds their meetings]. I loved MacDonald's 145 boat with the old Flathead FORD. CBF had races in Ontario during the summer and I was lucky enough to get to a couple each summer. There was always a good boat count in 145 class and there were elimination heats to get to the 10 boat final. Boat design and engine choice changed during the years, but, boats and motors were always similar, so there was always great racing and very competitive. It was a STOCK Class.
Here is an example:
Crazy fast for the size of the boat!
https://www.youtube.com/watch?v=ASe9XFcIw1o&app=desktopIF YOU ENJOYED THIS VIDEO YOU WILL LIKE THE VIDEOS THAT FOLLOW IT.