60's fan is 100% correct. They had Bud take off the nose and square up the tail. They later added sheet metal to close the cockpit side in some. Later in the season someone complained that the cage didn't have an X brace in the rear so they added a "decorative" X brace for the most part. It served no purpose other than appease the whiners.
1966 was a challenging year for CVRA officials. The Tiger car was also an issue and caused a big raucous one night. I am not sure what the issue was.....but I think it was about an open rear end. The rules were really getting tested from 1962 through 1966.....hence they opened things up in 1967 and you basically have what you have today....Sprint Cars. Tube frames was the big kicker......
Port - 15.1 seconds = 179.8' per second = 122.6 MPH
Eldora - 12.7 seconds = 180' per second = 122.7 MPH
Selinsgrove - 15.8 seconds = 176.9' per second = 120.6 MPH
Williams Grove - 16.1 seconds = 173' per second = 117 MPH
Lincoln - 12.7 seconds = 145.2' per second = 99 MPH2015 Attendance
Speed Palace - 15
Grove (Won a free pass...so at least 1) - 1
Hilly's (Maybe) -