10-bolt 373 Rear -Pulling My Hub

[79TransAmHitch]

I have a 79 Trans Am and it's got a 373 10-bolt Possi Rear. My problem is the rear right seal is leaking DIRECTLY into my drum brake. The same side (Right Rear) had a broken strut, so I assume the leak began when that strut was broken before this car made it's way to my driveway. The oil leaking into my drum is thick and most definitely is differential fluid.
I've decided the best course of action is to pull the hub, re-seal my hub, clean out my rear drum, replace the brake fluid, replace my spring kits and pads... and she should be like new. I'm friendly with several machine shops and have access to a press which I expect to need for re-sealing the hub(s).

The PROBLEM is I can't figure out how to pull my hub.

People keep telling me there must be a pin holding the hub in, I removed the center plate (Drained the remaining fluid in the process) but I can't find an allen key pin OR a C clamp of any kind. There are two holes - one on each side of the center cogs... Spun the wheels and all they reveal is a shaft, no pins.
Hub pullers seem to all pull the hub from the sides and push in the center of it. I think if I took a hub puller to this it would break a puller while attempting to fold the hub like a flower after sunset.

(I have great pictures but I don't think I can post them here, I can put them on another site if need be)

Any advice? I'm lost in the dark. My thanks for your considerations.

[maxwedge]

Easier for you to check this site good pics and info at autozone.com, repair guides.

[MagicRat]

Thank you for your detailed post.
You should get a service manual for the car or look at the detailed procedures on line for a couple of good reasons.

Your rear axle uses C-clips that hold the axle shaft in place. When these rear ends are assembled properly, they are very durable.

However, that C-clip is a weak point, because the only thing holding the axle shaft (and thus your wheel and brakes) in place. If it is installed incorrectly or damaged, you risk a wheel coming off and you losing control of the car.

Another reason why a manual is important is some of the terms you are using (hub, cogs etc) are not the proper part's names, so a labelled diagram is also important to have, to avoid any misunderstanding.

It's been a while since I did one, but I believe the shaft which holds the spider gears is held in place with a locking bolt. If the bolt is removed, the shaft can be removed, the spider gears fall out and you can get to the C-clips. I might have left out something, but it's simple. But get the manual first.