Ah! This looks exactly like what I was looking for! No extra content, just simple graves! And for 1.7.10!
I have to test and see if this works with the Baubles and TiCon inventories... If it does, I think I've found my new go-to grave mod!
Edit: Might I suggest making it breakable by an empty hand at a decent speed? After you die and lose your stuff, you probably won't have a pickaxe and I don't want to need to chop a tree down every time I die just to make one.