Check out this site, Bob, it has a pic of a 1929 lathe for doing metering rods to a hundred thou. Also a Carter 3636s, built for Pontiac in 63 for NASCAR , it flow tested at 939 cfm.
http://www.thecarburetorshop.com/Carbshop_virtual_museum.htm
http://www.thecarburetorshop.com/Carbshop_virtual_museum.htm