Rear end swap/install
lolz on the 40 min. but you can totally do it by yourself.
spray down all your fasteners with whatever weapon of choice on the slick stuff a few days in advance. this includes the brake line fittings and e-brake stuff as well as the u-joint fasteners.
are you reusing your brakes or going with the brakes that are on the "new" rear end?
basically, you'll want to take everything loose, leave the springs attached at the front and support the axle, then pop the springs off at the rear and drop them down, then pull the assembly out the back. you can use a floor jack or a furniture dolly or whatever to support and move the unit.
if you're reusing your brakes, you can pop all of that apart before you pull the axle and just support it. then knock it all back on the new one and you won't even need to bleed your brakes. i don't recommend doing it this way, but it can be done.
if you've never done it, and you don't have power tools it's a solid half day job.