Do i need a pcv valve

I have a 351 bored to 358. It has 11:1 compression,ported stage 2 twisted wedge heads,victor Jr intake,holley 850 carb,.588/.612 lift cam. It has adjustable upper and lowers. Moser axles and moser spool. Has all the suspension components for a strait line. Either my oil pan or rear main has a bad leak. I have no pcv valve,do in need one and what is the easiest way to do it. There are no power acc., heat or ac,it has man brakes.

Thanks

Mostly trackuse and occasional street. It has moroso valve covers with with a oil fill cover on each valve cover. The fill covers seem to be ventilated with a like a filter in the top? The reason i asked about the pcv is because i just blew my rear main. It is a 2 piece and it is leaking pretty bad.