305 ENGINE ASSEMBLY GMC GROUP 0 603 ROD ASM Connecting 77 78 All Blazer Jimmy 14031310 8 34 75 ROD ASM 8 1840A 0 616 BEARING UNIT Connecting Rod GMC 8 18608 77 78 All Blazer Jimmy 3910555 A R N L BEARING UNIT std 8 18608 77 78 All Blazer Jimmy 3910556 A R 6 95 BEARING UNIT 001 U 8 18608 77 78 All Blazer Jimmy 39I0557A R 7 00 BEARING UNIT 002 U S 8 18608 77 78 All Blazer Jimmy 39I0558A R 8 40 BEARING UNIT 010 U S 8 18608 77 78 All Blazer Jimmy 39I0559A R 8 40 BEARING UNIT 020 U S 8 18608 0 623 BOLT Connecting Rod Bearing Cap 77 78 All Blazer Jimmy 48I372 I6 1 25 BOLT 24 x 1 J 8 870A 0 626 NUT Connecting Rod Bearing Cap Bolt 77 78 All Blazer Jimmy 3866768 A R 33 NUT Z4 x thick 8 900A 0 629 PISTON ASSEM8LV With Pin Refer to Piston Chart for Model Application GMC 8 19208 NOTE Individual piston assemblies are available for warranty purposes and for replacement of pistons damaged when making repairs to engine assemblies When ordering such parts it is necessary that you specify on your order the reason the parts are required and also that the following note appear on your orden Do not ship unit package quantity 77 78 All Blazer Jimmy 364702 A R 37 75 PISTON ASM std 8 19208 77 78 All Blazer Jimmy 364703 A R 37 75 PISTON ASM 001 0 5 8 I9208 77 78 All Blazer Jimmy 364704 A R 40 00 PISTON ASM 030 0 5 8 I9208 0 643 RING UNIT Piston Service Sets GMC 8 19608 Original Equipment TVN Complete Set For One Cylinder Per Container 77 78 All Blazer Jimmy 370409 A R N L RING UNIT std 8 19508 77 78 All Blazer Jimmy 370419 A R 13 35 RING UNIT 030 0 5 8 19508 0 646 CRANKSHAFT NOTE 1 When using on models with AT remove clutch pilot bearing 77 78 All Blazer Jimmy 36 982 I 322 00 CRANKSI 1AFT Note I 8 I450A 0 649 BEARING Crankshaft Clutch Pilot 77 78 All Blazer Jimmy 3752487 1 N L BEARING bush type z 0 8 x I 5 0200 0 659 BALANCER PULLEY Crankshaft 77 78 CK I 2 Sub Blazer Jimmy 458652 1 53 75 BALANCER 8 1450A 77 78 C 1 Cab 458653 1 53 00 BALANCER 8 1450A 77 78 G 1 Van 6272221 I 53 00 BALANCER 8 1450A 77 78 All Blazer Jimmy w C A C I 4023148 I 32 25 PULLEY crankshaft 3 grooves 7 dia 8 1650A 77 78 All Blazer Jimmy exc C A C 3956866 1 18 50 PULLEY crankshaft 2 grooves 6 dia 48 1650A 0 662 WASHER Harmonic Balancer and Crankshaft Pulley 77 78 All Blazer Jimmy 14001829 1 1 00 WASHER balancer I D x 1 0 D x thk 8 460 0 666 FLYWHEEL Wlth Ring Gear 77 78 All Blazer Jimmy w A T 340298 1 N L FLYWHEEL 8 I980A 77 78 All Blazer Jimmy exc A T 3988759 I I38 00 FLYWHEEL 8 1980A 0 669 BOLT Flywheel to Crankshaft 77 78 All Blazer Jimmy w A T 3727207 6 74 BOLT 20 x 290M V steel 8 2000A 77 78 All Blazer Jimmy exc A T 839756 1 31 BOLT ri 20 x 1 0 L 290M steel 8 2000A 0 673 GEAR Flywheel Ring 77 78 All Blazer Jimmy 399I408 1 GEAR I68 teeth 8 2050A 0 679 UNDERPAN COVER SCREW Flywheel 77 78 All Blazer Jimmy w A T I 4038636 I UNDERPAN trans converter 17 4009 WAREHOUSING AND D TRIBUTl0NDIVISION 0F GENERAL MOTORS CORPORATl0N LT TRUCK 51 i REV 283 0 29 0 601 0 679