Rebuilt six pack carbs, now it won't idle

[Righty Tighty]

Yep, this is the problem. I have different plates. You can see that mine have more squared lower corners, where yours are at a 45.

I found a set at Jegs, looks like I might use the gaskets for a 4160 secondary. This image is from Holley.

 

[Righty Tighty]

Found the correct gaskets and the outboards passed the bench test with no leaks, needles/seats held at 6psi. Installed on the car and it lit off on the first click. For anyone reading who has the same gasket or metering plate issue, Holley part number 108-27-2 worked for me. Thank you everyone for your help!