I spent the last few days sorting out the linkage for both pairs of AFBs. Building linkage on the bench is a lot easier than doing it stretched over a fender. The Carter 625s were already on the intake so I started with those. I set both pairs of carbs up for synchronized and progressive linkage so I can easily change over and find out what the engine likes best.

The synchronized linkage was a snap and took just a couple of minutes to set up.


DQS by M Patterson, on Flickr


The progressive linkage is just slightly more complicated but still pretty simple. It's so simple I just couldn't bring myself to spend $35 for a pre-made set so I spent about an hour building my own. I basically just copied the style used on the Chevys Dual Quad 409 cars.


DQ P by M Patterson, on Flickr


There is just enough difference between the throttle arms on the 625 CFM Carters and the Caddy AFBs that the linkage wouldn't directly interchange so I just built a second set for the Caddy carbs.


Cad afb s by M Patterson, on Flickr


Cad AFB P by M Patterson, on Flickr


Here's a shot of the other side with the fuel line.

DQFL by M Patterson, on Flickr

I've gone about as far as I can on the dual quads until it's time to install them. For now I'll throw a towel over them until I get some more Plymouth time.



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