71 valiant engine build, which carb to use

The last two posts are reasons I like the AVS2. The primary throttle bores are a little large, but I would hope the primary side would be tuned for the package to be fairly close to the expected 10-12 inch vacuum signal at idle. But bigger flow on the primary will give more power before the secondaries open when stepping into it. I would be surprised if the secondary air door would open all the way on it, either, when it is correctly adjusted to eliminate bogging.