PCV Side of engine....does it matter??

No.. but for '69 correctness would be the PCV on the Passenger side, breather on the drivers.
Yes, for all the pics I’ve looked at FOR A 69 340 DART.....PCV on the passenger side. All my dusters are on the drivers side w the breather on the passenger. THANKYOU for clarifying. But the looks of your avatar pic, I trust ya!!