In 1964 O'hare was one of the worlds busiest airports and I was answering this question."1964" "busy"
In 1964 O'hare was very busy at times and it could be quite a chore keeping up to a line of DC8's and B707's at their taxi speed flying single pilot in a B18.How much time do you have taxiing around busy airports, CWE?
Have you tried to mix with big jets on the taxiways at O'hare flying a B18 single pilot?
The longest taxiway I have used was 15,500 feet long at FVHA, so you had lots of room to fast taxi if you wished.