Putting grease in the fitting will not stabilize the shaft if that is actually the issue. You need the spring and disc to apply pressure to the shaft. Put an ad in the classifieds and se if anyonehas a junk distributor that has those parts and swap them in and see where you are at.
As for those little air cleaners, no, they are not even useful for a multicarb set up.
Last edited by Dragsix; 09/26/2019 8:26 PM.