Chris: In the eyes of our maker (Paul Bracq), we are all equals here. There is no bias towards the 280 SL, so please put those feelings aside. :-)
Seriously though, those injection lines are the same on a 230 SL as they would be on a 280 SL. I think there was a lot of variation in the 230 SL, particularly on the earlier models. Also, judging by some of the early factory pix, some of the earliest models didn't seem to be as "pretty," cosmetically speaking, in the engine bay.
Douglas Kim
New York, NY
280 SL #016220