There's nothing uniquely Diesel about a 603 chain so it'll be a cakewalk (what does that mean?) for anyone with experience rolling chains into MB V8s.

I've had 2 603s apart (3.5 with bent rods and 3.0 that replaced it) and what scares me about high miles is the condition of the oil pump chain tensioner. Both had deep grooves and missing chunks, albeit the missing chunks were not on the facing surface. In comparison the tensioner rail of both engines appeared to be in much better condition.

Sixto
93 300SD 3.0