Looking at your picture and your profile I suggest a heated garage, and hot coffee. Get it up on jack stands as high and safe as you can. Don't be afraid to cut your old one off to make it easier to remove. Good Luck
Make sure to put two jack stands in every location (my opinion...) these trucks are very heavy, and I've seen jack stands fail....so I always double up now. It's worth buying a couple extra sets for less than $100.