Sparks,
Statistically, more than 75% of driveability problems (stalling, backfiring, etc..) are caused by faulty electronics, not fuel. Make sure your ignition system is working properly before looking at fuel solutions. When I switched over to Weber induction last Spring, I also switched to MSD 6AL ignition at the same time, including a brand new set of Accel wires. After a few weeks of driving the car with no problems, the engine began to misfire severely as though it was starving for fuel. It turned out to be the Accel wires which were breaking down under the hotter spark from the 6AL. I could actually see the wires arcing at night. Good luck.
~Mike
