Three carbs are very hard to get running correctly, you have to start with the right ones and each one has to be the same. And when I say the same, I mean exactly the same, year, month, make, engine size, etc.....
They should give better throttle feel since the equalize the intake runner length.
The four barrel most likely will perform better since its easer to tune. Use a intake with small runners to keep the air velocity up. Step up to a mild RV type camshaft, and if you have room, use a long tube header. The shorty style headers are great for clearance but not much on torque. You will need to add heat to the under side of the intake if you add headers. The stock exhaust heats it now, and you must heat it if you wish to keep your fuel mileage up.
There are some tricks to adding air flow to the head, just opening them up will not do it. Go to the Inliners.org site and look up Tom Lowe. He will help you out with the head.
Joe
