[quote=klhansen]For any older Chevy, 9/16", 9/16", and 9/16"

Chris, good advise above, but from my old TR3, TR4, and E-Type days (all early 1960 vintage) I recall Whitworth sizes sometimes causing trouble. A 1/2" Whitworth equals an American 9/16th. So, as you put together a set of era appropriate tools, would Whitworth tools be British appropriate?