When I was somewhat involved with a figure-8 car back in 1976-77, we got it to the track in a similar fashion....but used the wheel dollies off the tow truck, dropped the rear wheels on them, picked up the front with the tow sling and off we'd go....though, the owner/driver of the car had an agreement with is wife, he would only run once a month, maybe twice at the outside, but don't really remember running more than once a month....
In early '78, he started building his next ride when he through his back out, and that was the end of that.
He was with the LAPD, as a driving instructor at their facility on Terminal Island between San Pedro and Long Beach.....