Oil leak- pcv?

Most likely that crank seal is just hardened and leaking.
But you're correct about the absence of adequate crankcase ventillation allowing vapor to find the next least path of resistance - often crank seals.

I have the feeling that if you pulled the balancer, you'd simply find that front seal vulcanized.

For your PCV, go to the passenger side and look at the back of the passenger side lower intake. You'll see the valve (it gets shrouded by a fat wiring harness) and it's egress hose heading toward the driver's side.

I'd replace the valve, grommet and screen with Motorcraft pieces - they all fit nice and tight (I can't say the same about aftermarket PCV valves and grommets).

Good luck bud.