Just replaced my Mitsibushi turbo with a used one. All went fine and I used a new method for affixing the oil return line (by the way the o rings are available thru Parts Bin)--a little gasket cement on the return line gasket so that it will adhere to the bottom of the turbo casing--let dry, position line in block and push in position over the gasket. Use a small piece of shingle to wedge between the line and the casing (toward front of car). This will both hold the line inplace and allow you to line up the holes. Then it is easy to put the allen bolts in. I found I could better position the wedge and the line from above.