Hi JE,
Start with the large 10 MM bolt near the spark plug, go directly across to the other 10 MM bolt, then across and forward to the 8 MM bolt, then back to the oposite side, next tighten the rear corner 8 MM bolt [behind the spark plug], then straight across to the opposite corner [nearest intake port], then all the way forward to the 8 MM bolt at the front [flywheel side], then across to the 8 MM bolt in the front [sidecover side], then lastly the rear center 8 MM bolt. Start at 140 inch pounds, then 160 inch pounds, then 175 to 180 inch pounds, and finish with the two 10 MM bolts at 210 inch pounds. A few words of caution, many if not most, cylinders don't have the same depth of threads in all holes. If the head was milled, it is possible the bolts are too long and "bottoming out". If the 8 MM head bolts still have the small thin washer attached, you might want to remove them [a simple pair of wire cutters will work]. The large 10 MM bolts don't have any washers under them, I usually make a set when I re-work my motors. Never tighten the head bolts while the motor is hot. If you are using 2 washers on each head bolt, remember, I don't.
Have fun,
Quenton