Gordon Rudolph made his first working IFS out of a Rupp, but then converted to using Polaris motors and parts because he wanted a stable supplier – and because he really liked Leroy Lindblad.
These are photos Gordon gave me for the book that I wasn’t able to fit in, but they are some pretty amazing shots of his IFS sleds and one shot (I believe from St. Paul, MN showing the Midnight Blue Express on the line) that Gordon took himself.