for example maybe u have a polaris chassis with a rotax engine engine in the 90's they were called rotaris, maybe it's a arctic cat with a 1500cc jetski motor in it, maybe it's a snowblade these are all other types of sleds
How about vintage models. John Deere, Motoski, Chaparral, Evinrude, Rupp, Skirule, Kawasaki, Harley Davidson, Snojet, AMF, Rupp, Mercury. Vintage snowmobile clubs are located all over North America and have vintage rides.
In the 70's there were over 50 different brands of snowmobiles on the market!!
Pre 1968 are considered antiques and include some of the early sleds that shaped our sport.
Since you brought up the subject, I took it to google maps, and technically speaking; Pullman seems to be down river from Clarkston, if you follow the Wawawai river... So if your main water supply comes from that river then it seems to me that it is the other way around.
I'm sure that your water purification plant is sufficient though