Rotors
Actually, if you refer to the Hub Info page, you'll see the difference between the rotors. For this kit, you want ones that look like the bottom picture, '87 HB(D21). They have the taller "top hat" on the rotor. You can also find the rotor to hub bolt info there.
NOTE: If you are installing the older, steel brackets, they require the '83 720 rotor like the second picture.
NOTE: If you are installing the older, steel brackets, they require the '83 720 rotor like the second picture.