W124

Quick question...what engine/fuel supply parts are common between these two? Browsing through the catalog, looks like the injector crush washers are different, glow plugs are different, mail fuel filter different.

My main question...are the injector nozzles & injectors the same (but perhaps w/different pressures?)? If the injectors are different (visually, hardlines look smaller on OM603), are at least the nozzles the same?

'87 300TD Wagon, OM603 6 cyl, trap oxidizer removed
'85 300TD Sedan, 5 cyl, no trap oxidizer (federal version)

Just got a sweet deal (I hope) on an '87 W124 300TD wagon. The SLS pump went dry a year ago, so I'm assuming I can just replace the pump, fix the leak and the system will work again, as it worked before it went dry? Or does further deterioration occur besides the pump when it runs dry?

I shall definitely buy the guide after I have the car.