Hey Jon how come your car wasn't competing at that race? To far to go?
Interesting the camaros didn't run bumpers, and most of the Mustangs didn't but the Cougars who were pretty dominant ran front and rear bumpers.
Also it wouldn't have been easier for that Z/28 to swap out a gas tank than locate plastic balls to put in there? they would have had to pull the tank to get the plastic balls out anyways right?
As far as I know, they felt it was too far of a drive to take my car to Green Valley. The Cougars ran fiberglass bumpers and only for the first few races of the season, then they eliminated them like most everybody else. For the '69 season, the SCCA reversed their rules and mandated that the bumpers needed to be retained. Some people acid dipped them and others like Penske made them out of aluminum.
I'm sure in hindsight Craig Fisher's team would have not gone with the plastic balls idea but they did and it cost them by melting and clogging up the whole fuel system.