The bigger question is, what stamps do you need? They were not generic one size fits all, most every car was unique, ink colors, date codes, gear ratios, some obscure unknowns, etc. Your own cars original stampings should be duplicated before removal so that they can be replicated. If you don't have them and aren't sure of what belongs there I'd recommend not adding any back, there are already too many clowned up ink stamped cars out there with imaginary markings. .02