quadra jet

hey gang,
I'm working on our '75 Chevy farm dump truck 305 with a Rochester quadra jet carb.
dead gas so the carb needs rebuilt
parts place wants a number off the side
but I don't see it
no triangle tag on any of the hold down bolts

anybody know where to look
thanks
hank

Look here and the look where they tell you to

http://www.recarbco.com/technical/rochester/qjet.html

thanks for that link
it is easy when you know where to look

hank