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He loaded it up and it backfired, Don't know how he did it but the carb never worked after that. I even rebuilt it and had a pro take a stab at it.

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Relax, all right? My old man is a television repairman, he's got this ultimate set of tools. I can fix it.

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So how many power valves do you have to replace on a six pack after a backfire?

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Only one just like any other old holley out there...And if it's backfiring your not getting fuel mileage or performance tuned like that !!! ...I'll take the 6 pack thank you...I can show you the good gas mileage I get right up to the point where the other two carbs come in... ..

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Hey Scott, Here's the thing... Chrysler thinks its 15hp better, NHRA thinks its 14hp better and some guy I know thinks his car doesn't go as fast with a thermoquad. How is that for scientific?

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Well, since we are going on looks alone I think this one is the clear winner

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If someone out there has a B engine spreadbore dual plane aftermarket intake I could borrow I bet we could close in on the pack.

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Well, since we are going on looks alone I think this one is the clear winner

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Speaks for itself!!

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I have ran 2 440s with the Edelbrock dual quad package. 2 500 cfm carbs with a 1 to 1 linkage. Great great and GREAT performance and looks! I know it not a mopar OEM offering but it is an era correct hi po set up. Its about half the price of a sixpack and easier/less expensive to tune. Id LOVE to see a shootout between the Six Pack and the Edelbrock CH28 with 2 4bbls.

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They (Chrysler) did offer a 2-4bbl inline setup
for the RB motor in the late 50's - early 60's.
The EDDY piece you have is a good design, lightweight and WITHOUT core shift (very little restriction in airflow). The shootout would awesome - try all three!!

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Since this is a question and answer forum, doesn't economy vs performance come into play. There are a lot of 4 barrel cars out the and not very many 6 pak cars. I will be replacing my Holley 750 DP with a Thermoquad. I'll bet I get much better gas mileage and more power(faster) at the strip. I have already tried the race on an engine dyno and the car was a pig at the strip. I changed cams, put on a dual plane spread bore manifold, took out the 4.30's and put in 3.23's. I realize now that a big part of my problem is a 410 stroker with Diamond rectangular port aluminum w2's. No torque down low. I'll let you know after I go to Sacrmento in September. Top gun dragstrip @ 4000' won't tell me much. The car ran 13.54 @100 mph at Top Gun in June. It didn't even start to run until 330'

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Would you up the gear to 3.90 for a comprimise with the TQ. 3.23's may be a bit too high, I could be
wrong, since I don't know how high your torque
band is and converter's stall speed if an automatic.