Break Help

[spenceman72]

Hey everyone. So when driving around yesterday in my 72 K5 I almost rear ended a guy at a stop sign...STOOD on my breaks and really didn't think I was going to be able to stop, but thankfully I did. The break felt super hard, like I could only push it in an inch at most..so I talked with a friend that is more mechanically inclined than I am, not saying much, and he said 'oh yeah, it's your power break booster'...sounded good to me so I ordered a new booster, picked it up today, and surprisingly was able to install it without much fuss at all in about 30 minutes. Problem is that I am having the same exact problems with the new booster that I was having with the old booster..break is super hard, hardly pushes down at all. So, I started looking around the engine and found where the hose connects to the intake from the booster, and in the picture is what I found..a connector with 3 outlets, 1 of which was for the break booster hose, and the other 2 just open..looks like maybe they had some sort of cover on them at some point..but nothing now. I started the truck back up, and with the air filter removed was able to feel that these 2 ports were just sucking in air. My question is are these 2 ports supposed to be open or closed? Perhaps they should be closed, and since they are open I'm not getting good vacuum? What are some ways I can test this for sure? If it is a simple as covering these 2 ports, then maybe the other booster was fine and I didn't need to spend the $$ on a new one?
Any advise is greatly appreciated!