Which rear axle do I have?

[fireguyfire]

I'm about to start restoring the rear axle from my survivor 69 charger. The car is a 318 car, and I'm 99% sure the axle is original to the car;I bought the car from the original owner and it is rough but very untouched; it even still had the factory rad hoses in it.
Anyways, I've restored lots of 8 3/4's over the years, and I'm assuming this is an 8 1/4" but it sounds like there is some debate over whether 69 chargers got 8 1/4" rear ends.
My car is a Canadian car.

The rear axle had as a weird vent tube that I haven't seen before.
Can someone out there confirm this is an 8 1/4" rear?

[Kern Dog]

Yes, that is an 8 1/4" axle. These were phased in on 318 and 383 2 barrel equipped cars.