one way to tell is if the throw out bearing snaps into the clutch you have the expensive one. You can remove the plate in the bottom and look into the hole if you see a metal ring on the pressure plate it is the expensive one.

http://www.tacomaterritory.com/forum/showthread.php?t=43190http://i148.photobucket.com/albums/s13/jerm5591/haspen5.jpg