68 Hemi Dart's at Mecum Indy

I was looking at the three cars that are going to be sold at Mecum Indy. I have a couple questions that I may know the answers to but wanted to reach out to the vast knowledge here. I noticed that all three cars have different shifters. Dual gate, B&M etc... I assume that was driver preference? Also,I was under the impression that they all started out as 383 darts but one of them has 270 door emblems and does not have the rear valance. Preference again???