Another idea...the '81 would have a 350C(lock-up) trans, which means there should be a pressure switch on the pass side, just behind the filler tube, with a two-wire connector on it. The plastic on these has been known to crack, and leak like you-know-what, and the location makes it easy to assume it is the filler tube, or the kick-down cable leaking.
However...this switch normally only has pressure on it in high gear(3rd), so it's not likely that this is the source of your leakage...
The kick-down cable could also be broken, which would create a fairly massive leak in that area...
We can guess at it all day, but sooner or later, you're gonna have to get someone to look at it, or crawl under there yourself and see. It might be a good idea to spray the area down with brake cleaner, to get as much of the wet stuff off as you can, then start it up. This usually makes it easier to locate the actual leak...

I did the clean up thing. I was still unable to locate the leak. I willing to do it as many times as it takes. I'm working nights so I do have time to do it. I don't have anything to do tomorrow so look for a post.

Will look tomorrow

There IS a Vent on the top of the unit...all transmissions have one somewhere. The vent is simply to allow the fluid room to expand as it heats up, without blowing the seals out in the process. Without a vent, pressure would build up, and the seals would spit the fluid out rather quickly.
If you are getting fluid out of the vent just from adding, you're either adding too much, or you have the wrong dipstick/tube for the trans, and the level is not reading correctly. The vent is at the very top of the trans...in order for fluid to run out of it if you are just adding fluid, the fluid level would have to be all the way to the very top of the trans case.

Well now...if you're adding fluid without the engine running, it could cause a burp out the vent, theoretically. What could happen is the fluid you pour in might not have time to fully drain from the filler tube into the pan before you start it up. Once started, rotational forces inside the trans, as well as the pumping forces of the pump, could cause the fluid stuck in the filler tube to form a "seal" at the filler tube. This could cause the trapped air in the trans to try to find another way out....thru the vent. I've seen that happen a time or two...
Always add fluid with the engine running, and this won't be a possibility.