1 it is 1.5 inches longer on each side (stock shee axle)p8nt said:
2. if your blaster is an 03 or newer it totally bolts on with no modification to anything
if it is older you can modify the shee axle to retain the stock brake hub or you can get an 03 or newer carrier and convert it to hydro brakes with bolt on parts
3. get a service manual and read it thoroughly, become familiar with what it tells you to do long before you loosen a bolt, then have a clean work area that is organized and it will go quickly