There is a metal gasket that you can install, many turbo shops along with ebay sell them for next to nothing. You don't have to run a gasket however, if the turbo flange and manifold is not warped. I use a regular wrench and could get to all my nuts, except for the nut closest to the block towards the front of the engine. I used a socket with a long (12" or so) extension to position the ratchet below the turbo.
Jason
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