Just in case you have trouble getting some baffles from edelbrock..
Spectre makes a rubber grommet for the valve cover with the baffle molded in.
A quick googly search for "baffled grommet" showed me that moroso and mr gasket make them too.
Sometimes the grommet type will clear big rockers and high lift cams where the baffle won't always clear. (the grommet fits between the rockers.)
You can also make one from 20 gauge steel or aluminum..It's just a plate with the edges bent up.