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I know this thread is old, but next time PM me. :thumbsup:

Thanks, guys. I took a look in the filler tube with a flashlight. There is an anti-siphon device in there.

I'm trying to siphon some gas out of my 68 Valiant to put in my truck because the fuel is a couple of months old and I want to put fresh fuel in the Valiant before I start driving it again. I have a siphoning pump that I have used successfully to empty the tank in the 66 Barracuda I used to own...

True. Edelbrock carbs do suck.

Article on the buildup of the engine in my Valiant: http://www.hotrod.com/how-to/engine/mopp-1106-1968-plymouth-valiant-427-engine-swap/ I can't take credit for it. I didn't build it, but none of that matters when I hit the loud pedal.

It's plenty of carb. You would be surprised how much power you can make with a 650.

Not in my experience. Out of the box, Edelbrocks have a flat spot. After tuning them, they have a flat spot. Paperweights in my opinion.

Holley fan here. Why did the float stick? Dirt in the carb? With Holleys if you run two fuel filters, you eliminate most of the problems guys have with them.

Try this. Next time you drive it and get it hot, shut it off, take off the air cleaner and watch what happens in the carb. See if fuel is dribbling out inside the throat of the carb, getting the throttle plates wet. If so, the fuel is getting hot, expanding and basically siphoning the float...

Phenolic spacer and (most importantly!) block the heat crossover in the intake.

Here is a two step fix for this and any other Edelbrock carb problem - Step One - unbolt Edelbrock carb Step Two - bolt on Holley carb Problem solved. I fought and fought and fought with my Edelbrock carb 20+ years ago. I was determined to run it because I had problems with my first...

One thing nobody has mentioned - get that carb leaned out ASAP or you'll wash down the cylinders. Check your oil for gas smell.

Another thing that helps with big cams is to drill a very small hole in both primary throttle blades. This allows more air in so you can close the throttle blades and get better idle mixture adjustment. If the throttle blades are open too much it exposes the transfer slot rendering your idle...

I had an Edelbrock 1406 on my car for a while. Never ran right. Put a Holley on and never looked back. If you are determined to keep the Edelbrock carb, block off your heat crossover. You don't need it in CA. Any carb hates heat, but these Edelbrocks really hate heat. Boils the fuel off in no time.

Good to hear you're happy with the the FAST system. I'm considering the FAST system also. I've read a lot of people's posts about their installs, but nobody ever posts detailed pictures of their fuel hose routing, fuel pump mounting or how they did the return line into the tank. Any chance...

I had the same problem with my 340. I used an angle grinder and ground it to within about 1/16" of flush with the block with no problems.

Not sure what you mean. Is the engine running on (dieseling) after the key is turned off or is fuel just running out of the boosters after it's shut off (no dieseling)? If it's the former, you need more advance so you can close the throttle blades down and still have the idle RPM where you...

The OEM's did do this. Chevrolet had a similar setup on 67 and 68 Z28s. http://www.1967z28.com/gallery/Ron-T/tribble-engine.jpg

No problem. That has a tendency to happen online. It's much easier to get your point across in person. :) You'll like the Street Avenger. It woke up my friends' 340.

I understand that cfm is airflow and jetting has to do with fuel flow. To say that the two are not related is ridiculous. Jetting has to do with the vacuum signal in the venturi. The vacuum signal in the venturi has to do with the volumetric efficiency of the motor, which is a combination of...

It's still too much cfm for a midly modified 340. Sure, you can jet it down. You would have to. But the problem is that you have a weaker vacuum signal in the venturi, which leads to sluggish throttle response. The accelerator pump is going to cover up some of that sluggishness, but it will be...

Get a Holley Street Avenger 670 cfm. From the description of your engine mods, a 750 double pumper will be overkill.