I'd suggest some penetrating lube on the downpipe clamp and the up-pipe clamp behind the turbo. Do it the night before you plan to work on it, then again 30 minutes before tearing into it. It will save you a good hour's worth of extra work.
Other than that, just take your time. Keep the engine bay area clean and clear, and don't forget to stuff rags in the I/C pipes and intake runners when you open it up. No one wants trash, dirt, or a bolt to find it's way in there.
When I swapped out my turbo I used copious amounts of PB Blaster also, I sprayed every bolt and clamp a few days before tacckling the swap and every day when I got home from work I would soak them again. All bolts came out and clamps came off easily. Gene :mafia
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