Start from the middle and work your way to the ends sort of using an X pattern. I usually do 3 increments 25, 50, 75 ft lb
10 6 1 3 7
8 4 2 5 9
something like this. I use anti-seze on the lower bolts (theyre in water) and a little oil on the long ones. Hope this helps oh and no sealer on the head gaskets