Garrett GT20 Project

[cwspellowe]

Thread lock? Wouldn't hurt. Just make sure you get them all tight enough that the housing doesn't have any chance of moving, but DON'T overtighten them as its an ally housing and will strip the threads making a life a total PITA.

Clocking looks to be off though tbh. The face of the manifold sits at roughly 30degrees from vertical, so as it is your compressor outlet will be pointing straight at the bulkhead. Depending on the size of the housing you may be ok, you'll probably find you need to rotate the outlet a bit more to the left (as you look at that picture)

8.8 bolts will be fine, they won't be under a huge amount of tension, not like wheel bolts or suspension parts. You're only bolting a few kilos onto a flat face. If you want to go overboard you can get gasket sheet you can cut to fit your mating faces but as Darren's said, slap some exhaust paste around it and you'll be grand.

Forgive me if i've missed this though, but what elbow are you using? For your sake I really hope you aren't using a 306 elbow? You want a nice fat elbow onto the downpipe or you'll really hold the turbo's flow back.