Zup, we (Motorman7 with my '73) also got dinged a point for the bead blasted valve cover.
However, in looking at your judging sheets, my calculator says you achieved 290 points, which is the level ("290 or above") for the Gold Medallion status.
From the current ZCCA Judging Manual " All vehicles scoring a total overall score of two hundred and ninety (290) points or above in their respective class (except Daily Driver) are eligible to receive the Gold Medallion or Gold Cup achievement award of excellence for their efforts."
I know they did not announce that for you at ZCON, but have you received that since? I hope so, you deserve it!