If it's what i think it is it shouldn't be to complicated, just a pain in the butt. Just take out the front bolts and jack up the cab enough so you can squeeze a grinder up in there to get the mount off. I've never done the actual mounts themselves on the cab but my father and I did the cab bushings back in January. while your down there your probably going to want to do the bushings, and if you do the fronts then you should also do the rear cab mounts so you don't run into alignment issues. You may have to do the bushings on your radiator core support, i'm not sure how many issues you will run into of you don't. My replacement of the bushings was all because my rad core support and my mounts for it were rusted out and and we decided that it could use the new bushings.