Part no.s for 67 thru70 rear secon. top butterfly arms needed:

[Mr.Pontiac]

Need info on 67 thru 70 rear butterfly shafts. this shaft holds secon. slotted plates closes on top of carb. Anybody with a original carb. the no.s should be stamped on outside & easy to read. Please notify me or email me anytime.

[unruhjonny]

I believe that there are at least two of them;
I believe I just replaced t he missing one from this carb here with one I had taken off another carb some time ago.
The one I have here is part number 37968

I hope this helps.