For around $450 I can replace my old early 70's technology Holley 780 for a new tech Quick Fuel 780.

Just wondering what you guys think of Quick Fuel carbs.  I talked to a QF guy at the Autorama and I got the impression that it is a new, improved design of a Holley 4150.  Easier to tune, etc., etc.

bump

Not exactly an answer, but have you considered going to a 4 BBL. EFI  setup?

$450 vs $2000-2500.

Yes it is a big initial investment when you first look at it. But looking at the overall benefits of EFI. One being a increase in fuel mileage which in turn over time will pay for the unit itself over time if you drive your car frequently. Much better drivability. Plus not having to do periodic adjustments or deal with the effects that E10/E15 fuels can have on carbs. 

I have a QF 750 on my 406. My opinion is if you're not pushing the upper limits of power output, you won't see noticeable difference with a new carb. Proper tuning of the carb and distributor are critical to getting the best performance out of your engine. Injection won't get you more power by itself. I figure I could buy a lot of E85 for the $3-4000 injection costs. As far as tuning for E10, just run no ethanol gas. YMMV

From what I unnerstand, the QF stuff is built with ethanol resistant parts to begin with. At least that's what I remember.
I couldn't say if the difference between the Holley and a QF carbs would be worth the money, but....I've never been a fan of using a Holley for a street car to start with. They're really nothing more than a glorified controlled leak. The QF carb is basically a modified Holley, but, depending on the particular carb, and the associated mods, it might be better.
I know quite a few racers that use them, and they seem to think they ARE better, as far as adjustments at the track, and the related improvements in ETs.
At heart, Imma Quadrapuke and Carter(not Edelbrock) AFB guy for street cars.