There are several recommendations here for the Holley 3310. The 3310 used to be my go-to carb for 440s. It is a good carb, but it is old calibration and design that requires several adjustments to work best on our engines.
I just have 2 questions for those that recommend the 3310 over the new Street Demon;
1st) Have you had a wide band O2 on your 3310?
2nd) Have you tried a Street Demon on your car?
Every 3310 that I have had on 440 has been too rich on the cruise. They need the mains stepped down several sizes for a good cruise mix. And then the PVCRs need to be opened up to get the WOT mix back where it needs to be and the power valve opening point needs to change.
On most, the secondaries open way late and so need a spring kit to dial in the best opening point.
And if a choke matters, the Street Demon had the electric choke standard.
If the OP is buying a new carb, he would be much better served with the Street Demon. More features, better calibration.
BUT, if the OP is on a budget and can tune, the 3310 is often a bargain at swap meets. They have been around for decades and the swaps are full of them. A little shopping can usually get a decent one for $75-$100. It will need cleaning, a kit, some jets, and a spring kit, but will do a good job.
By the time you get done freshening up the old 3310, you will have $150 or more in it plus your time.
For $200 +/- more the Street Demon drives better, won't need the parts or time, and has a choke.
The Street Demon is the carb of choice today for a street car.
