i don't think it really matters, just make sure after you install your new pumpkin to line up the holes correctly. It took me a few hours my first time replacing it. I was by myself.
make sure you have some PB Blaster
it makes things quicker. Also a pry bar would help after you unbolt the axles. my steps to taking off the pumpkin were:
unbolt driveshaft, unbolt axles, setup jack underneath pumpkin, unbolt pumpkin. but you'll have to wrestle out the old pumpkin and wrestle in the new one. it's kind of a pain. if you're doing it by yourself, you're going to have to unbolt the axle one or two nuts at a time because you'll have to pull the e-brake so the rear tires don't spin.