Up for Buy-It-Now is a new old stock brake master cylinder repair kit, Ford part number 91T-18370.  According to my Ford Manual, this number was changed to 91T-2004-A and is used on the following models and years:

1939-1947 Ford Trucks

  Included in the kit is one piston, 1 valve, 1 boot and 1 cup.

  The kit is in brand new, never used condition and is free of any damage.  The original box is brittle from many years of shelf storage.  Please feel free to E-mail me questions.  International bidders are always welcome.  Thanks for looking!!!!