I found I did fit when a local Ford dealer had one on display for a week. They made the mistake of not locking the door and of course I was straight in there! While I was sitting dreaming two younger boys came up and looked inside. This was a genuine racing car and had no speedometer of course (nor door-locks I wonder?). One of the boys looked at the rev-counter and said "Oh, it only does 70." The other looked the water temperature gauge and said "No it will do 250."
More speedo tales: my mother was always a nervous passenger and not capable of judging speed except by looking at the speedometer so when I bought a Mini Cooper "S" I pulled the speedo out and turned the needle down by 20mph -- a very easy operation on 1960's Minis. My next road car (two racers inbetween) was a Lotus Elite which had a kph only speedo. I had left the parental embrace by then and had not thought of the effect on her of seeing the needle at 130 when cruising calmly along. She was terrified the first and only time she rode in it!
My Lotus Elite and house-mate's Mini Cooper in 1975.