Yup, somewhat. That was my concern, that you didn't have a couple extra breathers that would limit (somewhat) the amount of negative pressure in the crankcase.... Running the system as you have it will work fine. Without baffles it would pull some oil. On one of my BBF valve cover sets, I run a tall, baffled tube with the evac hoses and caps connected to them... Never pulls any oil, but sure does a nice job of pulling enough negative pressure to get the oil vapors out of the engine.....