Drop Spindles - PST vs. Magnum Force vs. Fatman vs. ?

I had the Fatman's on my 63 Valiant.Why ? they were given to me from a friend that changed his direction. Did the 73 up discs at the same time.You can't even tell by the photos but it did ride nice. Also at the time I went to the larger .870 T-bars, and a 75 Dart 7 1/4 rear with the big bolt pattern.