I haven't seen any write ups on this so I thought I would pass some info along to everyone. If you are wanting to put rear disc brakes on your truck this is the cheapest way I have found to do it while using new parts. From 1999-2001 chevy offered the astro in a awd. The front rotors on it just slide over the wheel studs. The bolt pattern on the van is the 5x5. If you go to oreily auto parts you can pick up a new set of these rotors for $35 a piece, the calipers for the van run you $11 a piece and you can pick up a set if caliper brackets off of speedway motors for $11 a piece. Which brings your total to a whopping $114. Which I thought was a hell of a deal when you compare it to a kit from other places that usually start out at around $500. Hope this will be help to some people.