i used the studs off a couple of junk fork lowers - one 750 and one 550 - they're the same. they're exactly the same as exhaust studs. i also used anti-seize compound.
stock exhaust studs (and fork lower studs) seem to thread into the head more snugly. why this is, i don't know. but you can spin the correct size bolt into the head by hand most of the way. to fit studs, you have to use pliers on the middle unthreaded part or put a couple of nuts on the exhaust end.
a lot of bikes do use bolts and it's not the end of the world if you go that route. but just make sure you get the correct length, so the bolt is bottoming out in the threaded hole and not just hanging on by a few threads, which is i think what 754 is referring to.
