So, like, where does the vent hose go now? You'll definately be better off without the valve and running the hose to atmosphere. (or, as we do in Tennessee,straight up Al Gore's p'toot)
Also , I'd check to be certain how the intake taps have been handled. Some just run a hose between them. I think it's cleaner to remove the tap and replace with a short Allen head fastener on each intake.