The big thing is figuring out how to get a better angle of attack. Local dealer did one back then and it was a monster until you got into the powder. Simply wouldn't pop out of the snow. They lowered the front end and added big old Simmons skis and while it helped, the thing they should have done was D&R the chaincase.
I'd just go Float skid, way less weight, better ride(tamer) and you can find them fairly cheap.