Get some carb dip from the parts store. Whats available now is nothing close as good as the old stuff was but it still works ok.
I had one of those carbs back in the 90's, it worked really well on my 340. Its still available new last time I checked about a year ago.
used to work at the airport and they worked on em. Zinc chromate was a great primer. It saved quite a few. Actually soaking in b 12 for now. It wasn't as bad as i thought. Another throw on the shelf for now deal. Thx for the input!