One or Two Breathers

I have a 318 that I'll be getting back from the shop soon. It'll be bored .030 over, new cam, flat top pistons, dual plane intake, 4 bbl, and stock heads with larger valves. I've decided to not install a PCV and just use breathers. Is there any benefit from using a breather on each valve cover instead of just one? I have two of them, but if there really is no benefit from using two, I'd like to just install one of them.