from what i have been able to gather they are formula stx, z and ss. i know the difference is carb size and engine size for the ss but i am more interested in suspension differences... mainly going to be do 60 to 70% trails with the rest field/ditch banging(nothing seriouse but enough to make me smile) i know that the s chasis had the better set up and was perfected in 97 line up but what about the f chassis... how are they and what is this "bovine" set up that i have seen reading around here

The suspentions are going to be pretty much equal on those models but its fairly cheap and easy to upgrade those models of sleds to the SC-10 suspention which is far superior to the older C-7 suspention. As for those models I would go with the Formula SS if you can find one they are one fast sled. Apprently one of the reasons they quit making them was that they could beat the Mach 1 of that time so they were referred to as " Poor Mans Mach". I know a guy with an SS and it does rock.