Bump........
I don't know if you can install the turbo and manifold as one piece on a 2nd gen. I think there are a couple of bolts that you can't access with the turbo on. It's easy enough to just take the turbo off with the manifold on. Just hope you have a triple jointed arm to get a couple of the turbo bolts off. I know mine were rust welded on there real tight and I had a bear of a time taking them off.
I can’t get those housing bolts loose!Dont worry much about the bolts in the head. Mine came off no problem. The bolts on the turbo are another story! Its an easy job and if you want to make it easier, take the center section and housing apart from the exaust housing. This will make it much lighter pulling it out of the truck!