Really pretty easy, i put the frame on jackstands and use a floor jack to take the weight off the axle. Unbolt the shackle and slide the bolts out, put on the new and use the jack to line up the holes. The rear you may have to cut the upper bolts by the gas tank off as there is no room to pull the bolt out (when you put the new bolts on put the nut towards the tanks). If you have rust a cut off wheel is your friend, sometimes the shackle bolt actually fuses with the rubber bushing and will not come out. You're not reusing any of the hardware so don't be afraid to destroy the old crap.