JPJUDGE,
I have a 3320 Cab with the larger R-4 Tires and I am about 90" to the top of the cab. I also had an issue with height and had to raise the header to my garage with a steel beam to make the clearance. It was worth it though. It has never sat outside and I live in an area where we are getting alot of snow with more to come (Oswego County in New York State). I was using the front snowblower yesterday with the outside temperature at 4 degrees and a windchill of -19 degrees. It takes about 5 minutes to warm up and then I am comfortable with no hat and no gloves, laughing at the blow back of the snow. Many people on this site say they cannot justify the $5,000.00 + expense of the cab and say Carharts are just as good. Well I have Carharts too, but they do not compare to the awesome cab. If you have any other questions, don't hesitate to contact me.
Mike