Not necessarily... One of the differences between the '64 and '65 Barracuda is the parking lights come on with the lights on the '65 models. This fact seems to be pretty well documented.
This one is my '65.
View attachment 545146
From what I seem to be able to figure out, there's not any set year for the change. I was really curious about this and there's a ton of conflicting info out there... So I can't say what is the truth.
So why would some 1965 models have them and others not until 1969? That would be the mystery... I'm wondering if it's single v. dual headlights. I don't think it's the reason that some give of a Fed requirement with side markers in 1968.
I do remember my Dad wiring one his '68 300 so the parking lights came on with the headlights. I don't remember how exactly he did it... A couple ways come to mind. Either a jumper with a diode on the switch or just wiring them into the tail light wiring.