I'm looking for a used 064 HD filter base and cover. I believe the base number is 1122 120 3411 and the cover is 1122 140 1001.
Just my luck I see what you are saying. I found one on ebay, I think but it is the 3411. I guess I could plug the comp hole. Do you mind if I PM you the one to the link on ebay to see if I am looking at the right thing?
I see two on there. The new 3411 has the compensating hole. It can be plugged for Bings and other carbs without the snorkel. There’s another one that is used. That one is intriguing and may be the 3405 that is designed for Bings. I have 3 064s. 2 w Bings, one has a plugged 3411 af base.