Probbaly there have been thrmoquad swaps. And then there THIS.

I forgot I have a Quadrajet off an 86 360 and a Holley 4360. So I have options if this AFB doesn't work out.

This is older carter with small holes top to bottom

Green is pump check ball part number 122 - 108 s blue is the main jet , that's what it would have looked like in 1972. Sometime after that check ball was eliminated and accelerator pump Filled from the top, curious if yours looks like that.

I have a 500 CFM progressive Holley 2 bbl that needs choke parts and an overhaul.

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Joshua

matv91- Yep, my accelerator pump well has the check ball. Has "Carter" cast into the side, no signs of "Weber". I think it is a fairly old piece. Interesting that it is called out as a carb for a 383. The emulsion tubes on the venturis only have one big hole on the bottom. I should have taken some pictures while I had it apart. If I take it apart again I will take pictures.

Josh- that progressive Holley sounds interesting. Is it a 2305? Did you get it from Rob (DusterIdiot) by chance? If this AFB doesn't pan out, and if you are interested in selling that Holley, I may be interested.

Reed,

Yes, it's a Holley 2305. I bought it from Blue Van Dan so that it wouldn't end up lost in the desert somewhere. I have $102 into it and I'm unlikely to use it. My first preference is to trade towards another set of 198 rods, but cash also works.

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Joshua

Cool beans. I will keep it in mind.

It's alive!

I was finally able to try starting the engine up with the AFB on it. It ran terrible at first. I tracked it down to a wicked vacuum leak caused by an incorrect gasket in the adapter stack I had to use to mount the four barrel on the two barrel intake. Once I replaced the gaket the vacuum leak went away and it ran much better.

The carb is extremely sensitive to adjustments of the idle mix and curb idle screws. A 1/4 turn makes a big difference. Vacuum never got above 16 inches at idle, but the throttle response seems crisp and it idle smooth in gear and out.

Unfortunately, my meager welding skills proved insufficient for me to weld the O2 sensor bung to the exhaust pipe without leaks. So, for now, I don't have an air/fuel gauge to fine tune the carb, but it seems pretty good, and it is definitely better than the old BBD it replaced. I even found a four barrel air cleaner froma mid 80s 360 that fits the AFB and the Super Six air cleaner lid

Thanks for everyone's input, especially matv91 with the excellent info. I think I have this carb installed and working. Once I get the O2 sensor sorted and get the air/fuel gauge working, I might be back for more tuning help.

Doing the wrong thing the right way. Very good. Thanks for posting it Reed.

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“Buy the ticket, take the ride.”
― Hunter S. Thompson

Glad to hear it's up and running. Time for an entry into your tuners notebook. Lean best idle was achieved with mixture screws backed out how many turns. With a good face shield and a bright flashlight look down into the venturi's make sure they're dry no nozzle drip. Also gradually increase engine RPM till main system starts to flow , note rpm . Both sides should start at the same time.

Well, I spoke too soon. I took it for a test drive and it is doing the EXACT same thing that made me pull the BBD in the first place. Argh. I am now thinking it must be something ignition related because it just dies at a stop. Again, off idle is fine, but it won't idle below around 1000.