You could do this as a Super Turbo like Mauri H. and set the 606 to use the mechanical fuel injection like the 603 and the 602 but I wouldnt consider this worth it unless you were going "the full monty"
When ever I think Im getting over my head, I reread this thread on the VW boards:
SVTWEB's Passat AWD V6 TDI 6 speed manual wagon
Start with V6 GAS Auto AWD Passat wagon in USA. Buy V6 TDI 6 speed manual AWD Passat wagon in Germany. Stir and mix, presto.
