The Stovebolt Site Forums The Shop Area Engine Shop Correct 235 Paint color

Unless you're concerned about losing judging points just pick a color and go with it like Tim said. If you're concerned about being "correct" for judging you need to be aware of the requirements of the club/organization that will be doing the judging. The VCCA recognizes the gray from The Filling Station as being the closest to "correct" and there's a good write up on The Filling Station's site explaining why they chose that color. The Hirsch gray is generally considered to be too light. FWIW I used the gray from TFS on my 38 and it closely matched what OEM paint survived the years. Here is the page I referred to:
https://store.fillingstation.com/detail/FS-119/Chevrolet_CHEVROLET_ENGINE_PAINT_DARK_GRAY.html