Rad, for sure. Fuel feed lines are a bit different, but no big deal.

Air intake and exhaust are different, may need some heat sheilds from the 603 car, too. Vac system is different, but only on the engine.

Tranny is different, different cable, so I'd go for the two for one deal.

Probably need a different front peice for the driveshaft, too, as the 6 is longer than the 5. Easier to take the whole drive shaft rather than try to find someone to balance the old one with a different front peice.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!