Well, it's obvious that I misunderstood everybbody on the subject of V vs Straight, and the concensus is that it's a straight M110, which is certainly what I've seen in pictures of other 280's. Makes you wonder what else the seller might/might not know about his car.
The only other question I had was whether that's the same block they use with the later SOHC sixes, like that used in the 300SE. Not that it really matters.
seo