The current style A/S OEM drivers seat adjustment tracks (used from the early ’80s) were a cadium plated steel track and were prone to rusting and becoming seized and non-adjustable. These are now made and sold in Stainless Steel.
I have also found these same tracks in some Malibus, and Mastercrafts, and Ski Supreme’s, may be in other ski boats as well. Some builder mount these “upside-down” , see Malibu pic for this example.
Base tracks are 12 3/8″ long, and 1 3/4″ wide
Mounting bolt holes in the master and slave rails 11 3/8″ Center to center
Mounting studs in the master & slave rails are 11″ center to center
