C'mon, there's no need to gin up a problem that doesn't exist. We don't "need options" in PCV valves; fully compatible, direct-fit, correctly-calibrated PCV valves are readily available for any engine that might find itself in a Mopar A-body, and will be for the foreseeable future. There are plenty of parts-unavailability situations for old cars, but this is not one of them and won't be for many years.