Vacuum Hose/carb help

[brian's 77]

I have this hole and a hose on the intake manifold behind the carburetor. I put on a new edelbrock carb and was having serious idle issues and it was running real bad until I found both the hose and this hole behind the carburetor. My old quadrajet used both of these vacuum lines on the carb but there is no place for these hoses on the new carb. Do I need to block these off separately or can I just route the hose back to the hole on the manifold... Itll make more sense in the pictures... The first picture I plugged the hose back up and the 2nd picture it is disconnected

Also I adjusted the idle and air/fuel mixture and it seems to run pretty good but when I rev the engine from an idle sharply a fireball pops up out the carburetor... Thats not normal is it? If it isnt, how do I fix it?

Thanks!