In my never ending search for more tuning tips and information on the quadrajet, I stumbled upon this little tidbit of information online, a different way to adjust your air valve tension:

Q-jet Secondary Air Valve tuning tip

It would replace the allen key adjustment permanantly, which i'm not wild about, but nonetheless it is a neat bit of info that I thought i'd pass on.

 

Running an air cleaner with that setup looks like a pain. I also don't like the way the hanger is going to encounter friction dragging against that washer.

 

Nothing to hold the adjustment, either. You would also have to back off the factory tension spring completely, which wasn't mentioned.

 

Well, you could use double lock nuts if you wanted, to hold the setting but I don't think it'd be a good long term solution. And a longer stud, with another wing nut for the air cleaner.

Yea, i'm not rushing out to do this, but it's an option, if you were desperately trying to tweak your air valve spring adjustment, and didn't own an allen key

 

Another problem with doing that, is that the stock air valve spring isn't linear like that. The OE one slides along its little lever arm as the valve operates, which changes how much tension it actually exerts according to how far it's open. If it didn't do that, i.e. if it always stayed hooked up to the same spot on that lever it hooks to, then that other thing might replace it adequately; but as it is, it's definitely not going to produce the same opening vs. flow curve as the stock one.

I kind of doubt that it would work right, at all, to be honest. Looks cute, but probably not good for much beyond that.