Yeah sure, if you don't mind oil leaks! You need to have a way to draw the crankcase gases out of the engine. If you don't you'll be posting on here about chronic oil leaks like all the other guys running just breathers do.
Funny, because my car doesn't leak...and my car is about 75% race, 25% street....maybe I'm lucky....maybe I know how to put on a gasket....maybe some people don't know what they are talking about.....mmm, many things to ponder.