Tci 727 leaked.

Sounds like it toasted the front pump bushing and brought the engine down to a stall. If that's the case, it probably won't restart, because it can't turn fast enough. So plan on a new converter, front pump and possibly a complete tear down of that transmission depending on how bad it sprayed metal everywhere.
I had that happen a few years ago pulled the rpms way down in my 360 so I cured it with a new trans and big block lol