Was Steve Pardini's 68 Z/28 there? That's the one that does it for me. I still remember that black 68 RS Z for sale way back when at the Cal Expo in the " olden days ".
I guess I'm dating myself....but, I know a thing or 2 about GENI Z/28 Camaros, I sold Chuck Hanson his 68 RS numbers matching 302 but I had to look long and hard for that cowl plenum air cleaner. That 68 had a hard life, radiused rear wheel wells for slicks and a 5.13 Zoom gear set to get that 302 down Fremont Drag Strip
Commissioning the reproduction of the 2X4bbl Xram air cleaners made me a good side income for a while before my metal guy started selling them on the side...probably should have put a cease and desist order out on that but Darell was a good guy to me in getting those air cleaners done.
You want to see a great collection of early Z/28s look up Dr Milton Kim in Hawaii sometime, he has the 69 JL-8 Z/28 with the V-75 liquid tire chain option I saw back in about 1979 at Laguna Seca. I think that car was special ordered by an Edelbrock sales rep.....that is one BADASS rare option Z/28.