http://www.turbotimelounge.us/gallery/album93
now you will know how to install them as well:tup

pics are courtesy of Eric Rue, the guy you will likely be ordering from, so thank him)
I'm rocking 450s, which are great except for the driver's side front, as I still have my T-case(removed the rest of the 4WD components), it makes the driver's side front part of the car very heavy.
My blazer is essentially stripped, so I would reccommend 550s or 600s to anyone who still has a spare tire and back seats, and 450s if you're setting it up to be extremely light(and probably not AWD)