Been having some problems with the 4640SA Carter AVS on my 69 Charger. Its a very mild 440; six pack flat tops that sit .005" below the deck, 452 heads, K6401 Summit cam, stock 70 AVS intake manifold, TTI headers into 2.5" duals and an h-pipe, 3.23 sure grip. Since I put the carb on almost a year ago. It has been completely rebuilt, all passages blown out with 140psi of compressed air, HIC blocked off, new floats, etc. My problem with it is it doesnt seem to idle right. The mixture screws are almost 4 turns out, to the point I had to stretch out the springs on the screws to keep them tight. Any further in and it starts idling like garbage. It will literally burn your eyes standing behind it. I switched over to the two step Edelbrock rods and jets on the primary side. Im currently running 70/47 rods, and .113 jets...secondaries are .098s. After a drive, the plugs are a very dark brown. I need to lean out the cruise side and was going to try out some 73/47 rods. Distributor is at 14 initial, 35 total, all in by 2200rpm. I picked up a fresh Holley 3310 (750) from a friend of mine, and I have a perfect 6322s Thermoquad. Ive never been much of a Holley fan on the street, and always preferred Thermoquads. Im not a fan of squarebore/spreadbore adapter plates though.

I have been fighting this AVS for a while now, and am not a fan of spending $15 for a pair of rods, and over $10 for a pair of jets. A reason I have never been much of a Carter/Edelbrock fan. I have a complete Mopar Performance Holley jet kit with sizes ranging from 64 to 99. The Holley is tempting me, but dont like the idea of relocating the coil to put it on.

For a car like this that is cruised around on the weekends, run hard through the gears every time its driven, etc, which of the three carbs would be the best bet? The current AVS, the Holley, or the Thermoquad?