What does this do, what is it actually aligning?

Its an Edelbrock #4025

Usually used on side draft carbs like on motor cylce or an MGB's SU style carb to Synch the carbs.

It measures flow.

it's what I use to balance my stack injectors,

So this is essentially pointless to purchase for a dual quad setup then?

That's one of those deals that the corvair enthuisiest-owner, couldn't be without.

It's made to measure flow thru a carb but it wont fit over a 4 bbl works only with 1 and 2 bbl carbs. I suppose you could make a larger base adapter and use it on a 4 bbl.

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So this is essentially pointless to purchase for a dual quad setup then?

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Yes

Gotcha....thanks

Blues, that isn't the exactly the same device he shows in the above posted pic, the one Dan sells is a custom made version of the same thing (same device mounted on a plastic cup to fit a 4 barrel).

The original poster does not need one of those to tune a stock/factory Mopar dual 4 setup. Yes I have one in my tool box and use it for some applications, works great, but in the original posters case he does not NEED one, a vacuum gauge and/or a tach will do the job just fine.

Scott,

Why is there a Christmas tree on your roof, shouldnt you be picking up some candy or maybe a Turkey?

LOL!

Jeff......Already stocked up on Snickers, Butterfingers, and Reeses. That's not a Christmas Tree, it's a butterfly giant catterpillar (someone else made the gif and posted it way back in June when I was working on my wagon)