Dick had several contacts at Chevrolet, but I do not remember the names. The way we got Z-11 parts after the ban was on a special order form that had to have his name, address, dealer ship name, and serial number of Z-11 car. He had to sign orders. We could order one, or one set of anything that was avaliable. Ie one set of heads, one cam and lifters. Once those were recieved, then we could order more. I worked at the local Chevy dealer and one of my "jobs" was to keep on top of the thing DH needed. He would tell me at night what to order and the next day I would order. Remember, no UPS, no e-mails. It took time to get these items, so reorder was very important.
I think the pic you posted was taken in 65. I think this is the first Chevy II he had. The Chevelle, along with its twin had been sold, his to some guy in Pa. and the other one went to some people in the south. I believe there were 2 Novas of this body style, then the 66 Red car he built and Bill Thomas Race Cars.
He had the opportunity to race a T-Bolt, but his heart was not in it. Chevy was his love.