Some more pics of my 300tdi-LT77 combination that may give you some idea where the engine sits in relation to the bulkhead and steering box.
As far as I can see, your engine is in the standard 200tdi, 2.5 N/A location, if the gear-box uses standard LT77 mounts, and the engine is level, it is the only place it can be.
Your turbo should be very close to the passenger foot-well, the small pipe at the rear should touch unless modified.
I see that you have a TD5 engine cross-member, this should make routing the exhaust a little easier.
I still think that a four-bolt PAS-box will cure your problems and allow you to retain the viscous fan.
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