On the exhaust, when you fit the manifold, make sure you have the correct copper nuts from GSF or similar and that you've got plain washers under them. The nuts are designed to lock, even when hot, so shouldn't come loose.
If all of those studs don't have shoulders then you're fit to fit a rubber gasket. If some of them do, then buy a rubber gasket kit that comes with the right studs - could save any aggro and spilt oil all over your nice engine. Remember that the torque on those nuts is only 15NM (IIRC) which isn't a lot. If you crank them up more you'll distort the rocker cover and it'll be a right b!tch to get sealed.
That head really is gagging for a good acid dip, isn't it!