Couple of aftermarket valve cover questions

Thinking of adding some bling to the 273. Have a set of Cal Custom valve covers. Is there a way to add pcv to one of the oil cap holes, I don't really want to pop one of the cal custum plugs out. Thinking of having some paint work or powder coat work done, and woud like some pics to give me ideas. Also what can be done to the air cleaner to add some bling, currently have a black, 2 barrel unsilenced air cleaner, chrome?
Thanks
Aaron