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Jetting is the big thing most people overlook, and why 2x4 setups tend to get a bad name. The carbs need to be jetted approximately 20% leaner when used as a pair, vs. solo

It should not cause a notable issue, BUT it belongs on the other side of that pump

A rule of thumb is to jet the carbs approximately 20% leaner when using them as a pair

Do you have equal reaction when you turn either of the idle.mixture screws? If not, the low speed passage in one of your boosters is clogged. Unscrew it from the main body, and feed a bristle from a wire brush through the passages. That low speed is what feeds fuel to the transfer slots. Your...

Because they were an integral part of the package. Cali figured pointing the pipes downward, as on a non tip car, would disperse some of the heavier particals into the ground rather than their smog clouds

ECS was California only in 70, 49 state in 71

I have one of those 650 Spread Bores sitting on the shelf. Direct replacement for the TQuad, with Chrysler linkage and all. $75 plus shipping, if you're interested. Throw a kit at it, and you're good to go.

Yup, it will work. I have good used necks for $30 plus shipping. Pm me if you can use one

Is the pump mounted an any sort of angle? Holley pumps need to be mounted completely vertical to keep the lower bushing from wearing and eventually binding the armature.

You could, but it won't run optimally. The idle circuit is also partially a transition circuit. When using progressive linkage, the engine is pulling real fuel from the primary carbs boosters by the time the secondary side begins to open. You don't have that situation when running 1 to 1...

Progressive linkage, only idle from the primary (rear) carb. One-to-one always idles from all four corners.

If those are out of the box carbs, you're going to want to jet them approximately 20 percent leaner for the dual quad setup

If you want to do a 6BBL on the cheap, do some swap meet shopping and score a few 350 cfm Big Block Ford carbs. They used the 2300 series carbs from 67 through the early 70's. Can usually buy them for $5 to $10 each. Cut the back half of the air filter housing mount and fab up some...

The dominance of Holley carbs as much less to do with design than it does available sizes. How many fast cars do you see out there running carbs less than 800 CFM. Back to back, take a tuned 600 Eddy and an equally prepped Holley, put them on the same engine on the same day, and it's going to...

Stock Eliminator guys do AMAZING things with BBD's and Stromberg 2BBls. Look at the V/SA 273 2bbl Wagons if you want to see what can be done with that basic package.

That's actually a pretty neat idea. Good execution.

The only paraffin fuel I'm familiar with is nitromethane. I've never messed with Avgas, but I would not be surprised if it didn't somehow carry an extra oxygen molecule somewhere in the mix to help with high altitude combustion. If your engine is on the absolute verge of detonation..which is...

...I should have added in that previous post, the exception to this rule are fuel injected engines that run a knock sensor. The computer is always looking to dial in maximum timing, and uses the signal from the knock sensor as the limiting factor. A higher octane fuel will raise the roof on...

I hate to ruin the illusion, but your car did not run any better because of the higher octane...it ran smoother because of A-The purity of the gas, B-The lack of ethanol. The octane rating of a fuel only indicates its resistance to detonation. If your car is timed and jetted to run on 87, and...

In the past, I've just run a jumper wire directly from one of the Alt. Field terminals directly to the heating element...just like one would do with an electric choke Holley or Edelbrock, and never had any issues.

Given that it's a 76, check the EGR valve. Lots of low speed drivability problems can be caused by a leaking EGR.

Your problem is a sloppy needle and seat assembly. Just enough seepage to raise the fuel level to where it sloshes over into the booster when you make a turn...otherwise it just runs a tad fat all the time. Had this exact thing happen many times with these carbs. Last time it was on my 73...

The 800 does NOT necessarily have to be richer than the 600 at part throttle. If the carb is tuned properly, you would see zero difference between the two just cruising around town. You tune the low speed fuel mixture by changing the drop rods (metering rods) and the springs that are under the...

The 2700 rpm idle means you're pulling a bunch of air someplace. Primary or secondary blades not seating properly. Did you remove them from the shafts?..and if you did, are you sure they were reinstalled in their original orientation?