Larry, my pleasure.
I am not sure that this "four-wheel steering" really existed, but there is some evidence that it could have. All I can tell you for sure is that neither the 1962, 1963 or 1964 cars that qualified had it.
The 1962 cars were truly great cars. They, as the Cooper-Climax, then Cooper-Aston Martin did, simply lacked straightaway speed. The 1963 cars with the Chevies were faster but not enough. The 1964 cars were plenty fast but lacked development time. They could have been winning machines with a bit more time.
Actually, I remembered that I had a magazine with the Harvey in color on the cover, and I did, but it was the 1962 car - so here it is anyway. A future project Rick? Did anybody every make a slot car of this one?
Don,
The only slot car bodies I have seen of the 1962 cars were beautiful fiberglass 1/32 scale job that I got from the Bill Sippel archive in 1996. It looks like none of the other body companies showed any interest in this very interesting car, and it is really too bad.