250 ENGINE ASSEMBLY GMC GROUP 0 643 Cnn t 73 78 All Blazer Jimmy 326400 6 N L RING UNIT std 4 4 8 09508 73 78 All Blazer Jimmy 328503 6 13 30 RING UNIT 030 8 19508 0 646 CRANKSHAFT NOTE I For models w AT remove clutch pilot bearing 73 78 All Blazer Jimmy 460406 I 306 00 CRANKSHAFT Note 1 8 I450A 0 649 BEARING Crankshaft Clutch Pilot 73 78 All Blazer Jimmy 3752487 1 N L BEARING bush type n 0 D x 5 0200 0 659 BALANCER PULLEY Crankshaft 73 74 All Blazer Jimmy 3896590 1 N l BALANCER 2 grooves 8 1450A 75 76 All Blazer Jimmy 352153 1 59 50 BALANCER 2 grooves 6 0 D 8 I450A 77 78 All Blazer Jimmy 458149 I 59 50 BALANCER 2 grooves 8 14504 73 74 All Blazer Jimmy 75 78 CKG 1 Blazer Jimmy w C A C 3883263 1 I5 70 PULLEV 1 groove 6 A 0 D 8 I650A 0 666 FLYWHEEL with Ring Gear 73 74 All Blazer Jimmy w A T 471529 1 47 75 FLYWHEEL 8 I980A 73 74 CKP 1 2 3 Blazer Jimmy w 3 Spd exc H D Clutch L P Gas 74 G 1 2 w 3 Spd exc H D Cluteh 3986390 1 118 00 FLVWIIEEL 8 I980A 73 G 1 2 w 3 Spd exc H D Clutch 366860 1 127 00 FLVWHEEL 8 1980A 73 74 G 2 w H D Clutch 73 74 G 3 73 74 P 1 2 3 73 74 CK 1 2 3 Blazer Jimmy w 4 Spd H D Clutch L P Gas 75 78 All Blazer Jimmy exc A T 3988759 1 138 00 FLVWHEEL 8 I980A 75 78 CKG 1 2 3 Blazer Jimmy w A T 340296 I N L FLYWHEEL 8 1980A 0 669 BOLT Flywheel to Crankshaft 73 78 All Blazer Jimmy exc A T 839756 6 31 BOLT rr Z0 x 1 0 L 290M steel 8 2000A 73 78 All Blazer Jimmy w A T 3727207 6 74 BOLT 20 x 290M Steel 8 2000A 0 673 GEAR Flywheel Ring 73 78 All Blazer Jimmy 460583 1 17 30 GEAR 168 teeth 8 2050A 0 679 UNDERPAN COVER EXTENSION SCREW Flywheel 73 74 All w TH400 395266 I I I0 05 UNDERPAN trans convener 17 4009 73 74 All Blazer Jimmy w T H 350 465471 1 9 75 UNDERPAN trans converter 17 4009 73 77 P 3 4 d w Prop Shaft Park Brk 3714477 I 8 15 UNDERPAN clutch I5 wide 8 2105A 75 78 All Blazer Jimmy w A T I 4038632 I 9 40 UNDERPAN trans converter 17 4009 73 G 1 Z exc A T H D Clutch 354497 1 5 35 COVER clutch hsg 5 0990 73 G 1 2 w H D Clutch 73 G 3 exc A T 3843943 I 6 30 COVER clutch hsg contains large 2 dia round hole 5 0990 73 78 All Blazer Jimmy exc A T Prop Shaft Park Brk 6263757 I 5 35 COVER clutch housing 5 0990 73 74 P 3 4 pd w Prop Shaft Park Brk 3734908 1 3 60 EXTENSION clutch housing underpan 8 2025A 73 78 All Blazer Jimmy w A T 376300 4 35 SCREW w lockwasher underpan 20 x 8 20100 0 683 HOUSING BOLT Flywheel and Clutch 73 CKP I 2 3 Blazer Jimmy exe Prop sum Park Brake WAREHOUSING AND DISTRIBUTIONDIVISION OF GENERAL MOTORS CORPORATl0N LT TRUCK 51 REV 2 83 ee 0 643 0 683