There's going to be some slop, even on fresh threads with brand new bolts. And as a matter of fact, when I rebuilt my 2.8 V6, the new head bolts had a similar amount of slop. The only problem I had was due to the fact that I didn't put enough sealant on the bolt threads. So some coolant seeped through the threads.
Make sure to use plenty of sealant on those head bolts, and you should be OK.
[This message has been edited by Blacktree (edited 07-09-2015).]