[DavidExit29]

Redlight,
I have been running a Q-Jet on my bracket '57 Chevy for a few years now and I love it. It's a legal # 17056228 Chevy 400 smog carb. I ran the car for many years with a well worked 850 holley. The car also had a fiberglass hood with a snorkel scoop and an air box sealed to the hood. I put the stock hood and hinges back on the car because I like the super stock look. At the same time I switched to the Q-jet so unfortunately it is not a fair comparison.
Although it doesn't look like it in the picture the carb sits so high that the vent tube is almost touching the hood. The car is consistently .04 quicker in the 60' but is about .05 sec. and 1 mph slower in the 1/4 mile.
Basicly the car picked up down low but doesn't run as hard on the big end which is because of no fresh air (scoop).
The car is more consistant and runs great so I say go for it. Like the others have said give it plenty of fuel volume and try one mod at a time & see what it does on the track.
Keep me posted as I want to build another one and try some (not class legal) mods including switching to E85.

Regards,
David