(74-00-00) - INTRODUCTION OF NEW IGNITION UNIT EXCITER VIN 10-631045-3 (PIN 9238M66P11). SERVICE BULLETIN MOS HRSAISC - ENC SB 75-0001 R1 NO. 1 ENGINE - LPT ACC FUEL MANIFOLD BOLT REPLACEMENT. SERVICE BULLETIN COMPUED WITH - AT MANUFACTURE MOS 16-DEC-1998 HRSAISC - 0 ENC 0 SB 75-0002 NO. 1 ENGINE - INTRODUCTION OF HPTC VALVE VIN