Edelbrock Performer on 318

They will usually come out just by grabbing them with a pair of pliers, twist and pull up.
Start reading up on intake gasket installs on here, because there are a couple of things you need to know like using RTV or "Right Stuff" instead of the cork for the ends of the intake.
Also that the supplied metal shim gasket should not be used with an aluminum intake, and that the bolts need sealer on the threads when going back on.