you can easily check to see if you have the new cover. Just remove the pcv valve (with engine off) and look in at the 5 o'clock position. You'll likely need to shine a flash light in to see. I you see a 1/8" hole, you have an old design cover. If you don't see a hole, the cover is the new design. On my replacement cover (for a 2000) the space where the hole was actually had a little metal dimple, kind of like how an electrical box has knock outs that aren't knocked out until you remove them. This 1/8" hole is a contributor to the oil that you have accumulating in the pcv hose/intake/iac
piper