I see Cayuga is now called Toronto Motorsports Park. Found this website showing the current tower being built in 1966.
Kohler Drag Strip
The track at Georgetown was only open for a few years. From 1970 to 74 or so. I lived in Georgetown at that time so I spent a lot of time there. I was there the night Dick Harrell was killed. The night before that happened he put on a great show. The only time I had seen someone do a fire burnout.
Andy