750 AVS or Thermoquad?

As far as I know tq jets and rods are hard to come by, but a dialed in tq is VERY hard to beat. The small primaries provide very crisp throttle response. It is by far the best street carb I have run. If you follow the instructions provided by Edelbrock for his carbs you can tune them but be prepared to pull the lid off the carb quite a few times until you get it right.