Help with 340 compression + cam change

Of interest regarding carb size:
I have the "Tuning To Win" book from Don at Four Seconds Flat, and he and others, remind us that, in a sense, we burn air, not fuel. And if we have a hard time getting enough fuel to the motor it means the carb is too big, not too small. It's the mixture we are going for, and a large carb will feed so much air that it's hard to get the right amount of fuel.

And also, someone here had posted a video talking about how a smaller carb helps with the velocity into the intake, giving more torque at the bottom end. And, besides street performance, the video talked about how a smaller carb will often win on the strip due to the influence off the line.

All of this says a smaller carb is good, but then I always hear how the 340's LOVE bigger carbs!!! Makes it damn hard to decide whether the 650 or the 800 would be best.