307 ENGINE ASSEMBLY 0 543 BEARING Camshaft No 2 Front Intermediate 68 72 All 307 3723585 1 3 90 precision type stamped 2 73 All 307 474005 1 12 25 BEARING 0 539 0 546 BEARING Camshaft Center and Rear Intermediate 68 72 All 307 3723586 A R 4 00 stamped 3 and 4 73 All 307 474005 2 12 25 BEARING 0 539 0 549 BEARING Camshaft Rear 68 72 All 307 3723585 1 3 90 precision type stamped 2 0 543 73 All 307 474005 1 12 25 BEARING 0 539 0 553 PLUG Camshaft Bearing Hole cup type in cylinder block 68 71 All 307 1st design 3704158 1 41 2 B dia 71 73 All 307 2nd design 3997752 1 26 PLUG rear brg has mfg ident mark 0 603 ROD Connecting Less Dipper 68 73 All 307 3916396 8 21 35 ROD 0 616 BEARING KIT Connecting Rod NOTE 7 Aluminum M 400 68 73 All 307 3910555 A R N L BEARING KIT std Note 1 68 73 All 307 3910556 A R 5 95 BEARING KIT 001 U S Note 1 68 73 All 307 3910557 A R 6 00 BEARING KIT 002 U S Note 1 68 73 All 307 3910558 A R 7 20 BEARING KIT 010 U S Note 1 68 73 All 307 3910559 A R 7 20 BEARING KIT 020 U S Note 1 0 623 BOLT Connecting Rod Bearing Cap 68 73 All 307 461372 16 1 05 BOLT 24 x 15 S4 0 626 NUT Connecting Rod Bearing Cap Bolt NOTE 7 Also used with bolts not requiring cotter pins 68 69 Chevy Chevelle Camaro 307 9422298 A R 15 G 24 x 5 6 thick one end chamfered 8 917 68 69 All exc Chevy 307 70 73 All 307 3866766 A R 22 NUT 24 x B thick hex nut both ends flat Note 1 0 629 PISTON ASSY with Pin 68 72 All 307 3923294 A R 30 50 PISTON std 68 72 All 307 3923297 A R 29 50 PISTON 030 0 S 73 All 307 6271087 A R 30 50 PISTON std 0 643 RING KIT Piston Service Sets 68 73 All 307 326400 A R N L RING KIT std 68 73 All 307 328503 A R 10 95 RING KIT 030 0 S 0 646 CRANKSHAFT Engine NOTE ls When used on A T it will be necessary to remove the pi ot bearing 68 AII 307 3930809 1 265 00 Note 1 69 73 All 307 3941172 1 265 00 CRANKSHAFT Note 1 0 649 BEARING Crankshaft Clutch Pilot 68 73 All 307 3752487 1 N L BEARING bush type gz l D x 1 gz O D x 0 659 BALANCER DAMPER PULLEY Crankshaft NOTE ln some cases double groove pulleys may be used in place of single groove pulleys NOTE Crankshaft harmonic ba ancer is also referred to as torsional damper 68 All 307 3896904 1 43 75 BALANCER w o pulley hub 4 Z 0 D 69 73 All 307 6272223 1 43 75 DAMPER torsional 68 Chevy Chevelle 307 exc C A C C Deluxe Air Cond A l R 3755820 1 12 90 PULLEY stamped 3755820 68 Pass w A I R 307 exc C A C 68 Chevy 307 3744043 I 13 60 PULLEY double 65 B O D painted black stamped 3744043 68 Chevy Chevelle Pass w P S 307 3751232 1 12 90 PULLEY front stamped 3751232 68 Chevy Chevelle w Air Cond 307 68 Pass w C A C C Deluxe Air Cond 307 3850838 1 14 80 PULLEY 7 G4 0 D GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVFl0LET 11 0 543 0 659 0 54 REV 4 81