https://restostamps.com/products/stage-1-number-kit-0-9-a-stamp-star-stamp-old-style-ford-model-a-b-t is the base set, and if you have late 31 you need the newer stamps in addition to it if you have a 1, 6,9 in your number. But check if anyone in your club has them first - I loan my out to club...