Trans ID 727

Hey I have a 727 tranny I need to know what the year is per the ID and even what it came out of if possible? I pulled this from a 70 340 duster back in 77 that was crushed at a junk yard from a horrific rear end wreck. But am not sure it was the origional? Car had a lod of mods on it. :headbang:

Here is the ID PK 8681862 4668 2297

If there is a web site I could look it up too, I just do not have a link for this info.
Thanks!