Blew up my rear diff - need rear end ID help - 1970 K10

[34GH111]

So I was going down the road about 40 and BOOM, rear differential decided to start trying to eject metal pieces through the housing.

I'm trying to read posts as fast as I can to figure out what I have and what I need but having trouble identifying...here are some pics.

What rear end do I have?

All I have to go on so far is I've got a 1970 K10 with 3.07 gears,
and this number on the axle TDG0313W
and this number on the carrier 3896839

and this hole in the pumpkin!!!