Hey Cheers Owen.
So on Friday I asked my workmate about this, turns out he has done ALOT of this sort of thing. Doesn't want to do it himself because its been a while, but he has given me this little kit to borrow. I was expecting an easy out kit but what he has given me has brought my confidence levels up dramaticly. Check this design out! You drill the stud, hammer one of these in, put the collar over and turn with whatever!
All I need now is a right angle drill bit from bunnings and some Imperial drill bits.
Ok so the broken studs are (from front) #1, #10, #11 and #12. So one at the very front and 3 at the very back.
It would seem the biggest obstruction would be the air con unit at the back of the engine bay. Dump pipe can of course can be taken off if its in the way.
So I got the tools dude... You done this sorta thing before?
P.S
I got no idea how to upload a photo anymore? this took me fkn ages!