Thanks to all who replied about the s4 watch items.I got them to change the timing belt before I bought it.GREAT CAR. Now for the question.Anyone have the part #'s for r/l rear brake calipers for '83 tqc? chassis # ----597.seems to be some confusion at my parts supplier. 437-615-424a or 853-615-423 (for left side),437-615-423a or 853-615-424 for right.Tia. smitty