valve cover problem

hello to all, thanks for all the help so far!!! I'm back with another problem. After the motor rebuild(4.2l, .030 over, comp.cam,milled head,borla headr,carb,tfi,etc.)I put on a new valve cover from 4wd hardware.I noticed some blue smoke .I thought it might just be my rings seating or something so didn't realy worry about it. Now the motors broken in and still getting it. More on start up or if i let it idle for a few minutes. The guy at the machine shop says he's seen this before with aftermarket valve covers on this motor, that they don't have a baffle for the pcv system to bring it down to the bottom of the valve cover like the stock one. Has anyone else experienced this? any solutions, etc.. thanks again!! gman