All of the pull-offs are still available, we had quantities made of every one that's been discontinued, not cheap, but we have them. There are also other options, and the secondary pull-off doesn't need to function on the Buick carbs, so you can plate on old can and put plug the hose to it if you need the factory look for your restoration....FWIW....Cliff PS: not pictured, but I also have the 73-74 Pontiac Super Duty pull-offs, 69-70 Pontiac metal cans with dual inlets, the Buick divorced choke carb rear P/O's, and the early Oldsmobile small metal canisters as well.....
For what it's worth, I sent my 800 cfm to Cliff to have it competely rebuilt to Stage 1 specs and bolted it on with next to no adjustments needed. Runs extremely well and the job he does is exceptional. He's a busy guy with a long backlog, so plan on that but it's worth it to get something that well done, I think. Nice guy to chat with as well. My 2 cents. Steve