Hello! Sorry so late with response. Yes, I used new head bolts each time, and performed initial torque (18ft lbs) plus rotation specs as found on this site. I used a white paint marker to keep tract of the rotation (60-60-60-10 degrees).
The head bolts were the most expensive items, I paid $13.81 each (x10) from Johhny Londoff Chevrolet dealer.