That's interesting. At first I thought you had "type-od" and meant to say the three engines on the right ( the three red heads ). Then I looked more closely and noticed the three engines on the left have casting bosses at the top of the cylinder fins around the screw holes, which seem to extend closer to the edges of the cylinder finning than on the rightmost engine. Yet all four engines have the grooves in the cylinder heads that indicate long strokes. Maybe the rightmost engine has a non-standard head fitted ? ( i.e. a LS head is fitted to a short stroke engine ? ).

Those red headed Webras look particularly nice. I hardly ever see them for sale.