take them both of, I had to take off the mani last weekend to check and fix the exhaust leak I had coming from there, luckily my mani wasn't cracked like I thought it was, I just had to clean and reposition the gasket, but I got all the way to the oil line coming into the turbo on the top, couldn't get the damn thing off!, I had already drained the entire coolant system, but that little oil line does not come off easily, I couldn't move it, and I didn't want to strip it, so I just kinda moved it around, but you'd have to get it off if you wanted to change anything out, I got lucky.. and I dono, maybe with the movement and if you can't get yours off you might be able to get the turbo off the manifold without taking off the turbo oil lines,.. but the last 2 times I have tried (1 with this car and the other when I was stripping my crashed msp) they were both bitches to try to get off. .gl ..
but over all, taking everything off and the turbo is much easier I think than trying to just screw around with the turbo/mani bolts, the back right bolt would be almost impossible to get off I think...