quadrajet

Well friend, you've come to the right place as everything you want to know is at your fingertips. The search function will reveal just about all the information available on Rochester carbs as well as which members are professionals at rebuilding them. The site is a veritable library of information and there happens to be more than one Oldsmobile expert present, though I'm not one.

The rules of the site state it's not 100% necessary for new members to introduce themselves but it is typical to give a basic rundown and possibly provide a picture or two, preferably with one being related to the topic at hand. I made the same mistake when I joined and can say that people are much more willing to help after a proper introduction and explanation of the situation.

You’d be looking for stamping number17085554 Rochester. Quite rare nowadays.

The stock carb would be a Rochester E4MC Quadrajet which is typically used on Olds V8s. This is not to be confused with E4ME Quadrajets which are used on Chevy V8s.