1970 Dart with collapsed suspension...

LOL if that is wet snow the weight of it alone is enough to "slam" the suspension................

In any case I think you have the low-boy WAY before the tractor, here (cart before the horse). You need to get this somewhere you can work on it, solid working area, jackstands, etc, ramps, whatever, "up" out of the ground and mud and whatever else so you can take some measurements and actually "see what you have"