73’ 318 dies under accel with new intake & carb

Wow, I'm surprised that you need to go that far to make it work correctly. I know the Edelbrocks claim to fame is the excellent performance for street vehicles, but can be tuned for modified ones as well. Setting the jets & rods to max would certainly pour a lot of fuel into that engine. I am running an AVS2 on my stock 360 & have a 408 on the way from Blueprint. Hope I don't have to go as far as you did to make it work correctly!
I would have been better off with a 1405 or 1406. Many people said the 1411 is extremely lean out of the box, so I would say the AVS2 is better than the one I used.