300SD Front rotors changed with build dates beginning 10/85 & later. (Why the change? 85 was last of SD as SDL cameme out in 86?) The thickness would work however, they are approx 3/4" larger in diameter thus moving pad contact surface out which will not work. AutoZone lists an incorrect part as the front wheel bearing seal. I ordered the seal from Advance (Beck Arnley vs Timkin AZone) and it is correct. Advance (this store at least) will price match any competitor including internet distributors. I'm returning the incorrect rotors to USAutoParts & will make Advance match price and free shipping depending on whether they can get Bremos in a reasonable time.