And to me too
Okay, there isn't a "model" derivative in the Straight Six's, but its well documented that the rear suspension was modified from chassis 59. However it's probable that it was further modified, as my car has V6 chassis features creeping in before V6's were officially launched. Mine is 50 cars from the end of S6 production, and many years ago I also looked at another car with the same features, at Chris Lloyd's place. I'm not sure which one it was, as I've noted Chris Lloyd told me both 252 and 285 had the same layout as mine, and I believe no 259 (though perhaps Jeff could confirm, if you remember ) also had V6 suspension features, from factory build.
P.S. Chris, now I've found my list, I will cross-check with yours and see if I have any other cars you don't