Ok not a big deal i quess, but just wanted to be sure..
So i have this old intake manifold gasket that has a hole in the center
and the new one doesn't have a hole.
Should i make a hole to new one or not?
Is this hole someway important to oil flow or something?

 

It's just a drain hole. Without the hole the oil will drop off the rear lip. If that is a low spot then putting a hole in it won't hurt. That way oil won't sit there and possibly crust up.