The local parts store came up with the following part numbers for a master cylinder rebuild kit for a 1953-54 Chevy. The pictures of the parts look identical but the description does not tell what bore diameter the kit is for. I know that the 1949-52 cars used the 1" bore and the 1953-54 cars used the 7/8 bore which is what I am looking for. Does anybody know which part number is for each size?
AC #19113997 (18g1228) and AC #19113998 (18g1229)