thanks for the offer. My problem is , I have about 300 rochester carbs in my collection , all on index cards by carb number . when Iam at a swap meet ,someone will ask me for a 1967 nova carb for a v6 auto . but do not know the the carb number. why so many carbs ? My wife says Iam a carb picker,some one has to save these old carbs and working on them is fast becoming a lost art. ps I also have holleys,motorcraft, carters ect. A fair amount of rebuild kits,choke pull offs ,and thermostats , but do not tell my wife