Anyone run a Street Avenger?

I'm not a huge carb guy and have not had much luck in the past. I do try to learn though.

I currently run a 650 Speed Demon mechanical secondaries in my 340 Duster 3.55 gears automatic trans with 2800 stall. It runs a Hughes cam #heh2328al

111deg lobe seperation/installed centerline 108deg
intake lift .506/ exhaust .524
[email protected] Intake223deg/ Exhaust 228deg

Stock Heads 2.02 intake 1.60 exhaust

This being said the Demon does run ok but its constant fideling to keep it that way. It doesn't run a choke and for a street driver that was a mistake. With the crossover block its very cold natured untill it DRIVES not runs but drives about 5 minutes. 5minutes of idle will not make it happy.

I always wonder if this is just too much high end carb for a simple set up and if vacuum secondaries might make it more street mannered.

I know a Holley style set up the best so was thinking about staying in the neighborhood IF I change.

Any input?