Slack in new timing chain

Goo! 3/4"? What kind of block work was done? Moving the crank centerline up? That's some ugly slack=especially for a new chain. Even if the crank was turned, the timing set should be nice and snug. When I pulled my old one off, it was probably as bad as 3/4" and when I replaced it with a new unit from Summit, the slack was all but gone...then I drove it 10k miles, and it was bad again :(