Last Sunday I was driving a '73 K5 Blazer I have around our snowy field. Theres only about a foot and a half of snow, but thats fairly deep for a stock height Blazer with sagging springs and little 225/75R15 street tires with 40% tread. I decided to venture out into the unplowed snow. I goofed around in it for half an hour and never got stuck. A couple times I thought I was hung up, but I was able to rock it back and forth and it came out. I even blazed through the untouched snow up the road past our barn that has an uphill grade. Snow was packed all around the front axle and springs by the time I parked it. I was pleasently surprised at how it did. It does have a 454, but power wasnt really the issue...as I rarely had to get on the gas very hard. It's supposed to have a factory posi-rear...I suppose that helped some.