71 4dr Dart 318 w 4bbl

Magiver said
You can't seriously be considering using a theroquad carb! That carb was made to comply with emission standards introduced a in the 1970s. It was designed to run at over 200 deg f at its center body and have the fuel bowl part much cooler so the gas would't boil. In order to run this carb it will have to be modified by someone that knows what their doing. Why? Get an Edelbrock 650 spread bore, you'll be much happier.
And by the way, rule of thumb, never put a used cam from another engine in anything. They will usualy self destruct in a short time. New lifters won't help. Used cams have only scrap value, even if they look perfict.

Thermoquad is harder to tune, however, Magiver, you are dead wrong about the performance. I seen in person a cast head, factory cast intake with a TQ on a 340 in an all steel Demon go high 10's. I've personally run the TQ and they perform. No, I never bought a performance kit, worked with it just as it was. However, lots more available and easier tuning with a Holley, or such. Also, I installed a stock 340 cam from an old '73 340 in a 318. That cam is still in the car today, and the car runs fine, and that was 16 years ago.