Info on small screw under triangle tab.What yr.

[Mr.Pontiac]

Looking for info on this subject, did pontiac carb.s ever run tops without them?? seen em on 67,s 8,s 9,s, reason for my inquiry
i have 4 tops without these screws are they a Buick or Olds top then??? email me anytime at rbudney@comcast.net

[carmantx]

Can you post a picture?  I do a bunch of Buick quadrajets and not sure what you are referencing here.

[unruhjonny]

Looking for info on this subject, did pontiac carb.s ever run tops without them?? seen em on 67,s 8,s 9,s, reason for my inquiry
i have 4 tops without these screws are they a Buick or Olds top then??? email me anytime at rbudney@comcast.net

I would wager that they are replacement tops, and probably Chevy parts at that.
I have noticed that only the Pontiacs used the larger secondary bleed hole, which is probably easy enough to modify from another carb top plate which has the pre-existing smaller hole.

I can't immediatly speak of Buick carb tops, but the 4MV & 4MC pre-1975 Oldsmobile and Chevy carb tops I have could be swapped in place of the original Pontiac part...