Cool find but I couldn't imagine riding those machines into the alpine. We had a GP292 same body style as sled on the right. It went like crazy on hard pack but powder was brutal.
Ahhh.... Memories... I can still smell the 2 stroke oil.... and the gas on my crotch from the carb spitting back.... Who knew it was ok to stand up when riding. LOL.
That's when sled's were light, you could actually load them into a pickup by your self with no ramp.
You could also with a little help load 2 in a pickup box, i have actually done it. hahaha
I have a few old pics i could post, maybe i'll do that