Bob and Bob, Thank you very much for the input. Comments I have received indicate that the 1/4" number set, the 1/4" A and star from McMaster-Carr will cover Model A's thru March 31st of 1931 manufacture. After that date Ford went to a funny looking 6/9 that is not available from McMaster-Carr. Somewhat off the "A" subject but still early Ford is in the latest Hot Rod Magazine on 32 frames, some really good information there.