Hi Paul,
I think I know what happened here.
I think the port by the flywheel is the one used by the stock turbo oil
return. This is the one I used for the PSRU oil return. The one on the water
pump end is the one I used for the turbo oil return. I'm not sure what its
used for stock. There's only one oil return from the turbo.

If someone cares to check me on this, the pictures Paul's refering to are at
http://kgarden.com/cozy/engparts.htm

Regards,
John