4.3L Block casting numbers
Block Casting #’s                                Description 
 
177........................85-86……..4.3L…2 Piece Rear Main Seal.
                                                             This Is The Early Style 
                                                              Block.
 
553,683………….86-88……..4.3L…1 Piece Rear Main Seal.
                                                              Non Roller Cam Engine.
 
011,867………….87-92……...4.3L…1 Piece Rear Main Seal.
                                                              Roller Cam Engine.
                                                              Has 2 Accessory
                                                              Mounting Holes
                                                              On Front Of Head.
 
535…...………....92-97………4.3L…Roller Cam Engine With 
                                                             Balance Shaft. Has A
                                                             10 Bolt Front Timing Cover.
                                                             No Fuel Pump Hole. Balance 
                                                             Shaft Casting Numbers Must
                                                             Be 10224542 Or 10172748.
                                                             Must Check Balance Shaft
                                                             Casting Number.
 
196,534……….95-99……….4.3L…Roller Cam Engine With
535,359                                               Balance Shaft. Has 6 Bolt
                                                            Front Timing Cover And
                                                            14 Bolt Oil Pan Rail.
 
756,073……….92-96………4.3L…Roller Cam Engine With 
   061                                                  Wide Intake. Head Casting 
                                                           Numbers 064, 209, 626,
                                                           Or 181 Last Three Digits.
                                                           4 Bolt Lifter Hold Down.
                                                            No Fuel Pump Hole.
 
090…………...96-99……….4.3L…Roller Cam Engine With
                                                           Balance Shaft. Has 6 Bolt
                                                           Timing Cover And 10 Bolt Oil
                                                           Pan Rail. Head Casting Number
                                                           772 Last Three Digits.
 
 
 
786,103………….87-92……….4.3L…Roller Cam Engine.
067,050                                                   Heads Have 3 Bolt Hole
                                                                Accessory Mounting On
                                                                The Front of Each Head.
                                                                Head Casting Numbers 
                                                                Are 786, 103, 067, And 
                                                                050. This Engine Can Be
                                                                Used To Replace The 
                                                                GM262LC.
 
196,534…………..92-97………4.3L…Roller Cam Engine With
359,535                                                  Balance Shaft. Balance Shaft
                                                              Casting Numbers Must Be
                                                              10224541 Or 12550286.
 
90M…………….00-05……….4.3L…Roller Cam With Balance
                                                              Shaft. Has Roller Rockers.
                                                              Head Casting Should Be 113.
                                                              10 Bolt Oil Pan.

Copyright 1998-2020 www.RapidoMarine.com