67 Ser 40 w C A C H D Cooling 8 cyl 68 Ser 40 thru 60 w C A C 307 327 exc Tilt TDM 3751232 1 2 10 PULLEY ASSY crankshaft front 63 65 Ser 50 w forged crankshaft 283 3795272 1 7 20 HUB pulley or balancer 65 66 All w key V4 long x Vw wide 3883206A R 10 KEY crankshaft pulley hub Note 1 65 66 All w key 1 long x Vu wide x Wu high 3885092 1 10 KEY crankshaft pulley hub Note 1 NOTE 1 Used with pulleys and hubs having a shallow Vi deep Keyway only All full depth Va slots take standard woodruff key 106751 two short or 144542 one long in group 8 960 NOTE 2 Requires key for Vt deep keyway 0 662 BOLT CONE NUT RETAlNER RlNG SHAFT SPACER WASHER WEIGHT Harmonic Balancer and Crankshaft Pulley 63 64 Ser 60 327 65 68 Tilt 283 307 65 Tilt 327 3815933 1 55 V 20 x 2V 65 69 All D351 D DH478 2454019 2 22 bal shaft center lock 65 Ser 60 327 exc Tilt 65 Ser 80 348 exc Tilt 9422407 1 50 V 20 x 2VZ 8 900 65 67 All D351 D DH478 9421226 1 25 18 x 1V2 8 900 65 69 All D351 D DH478 2382548 1 3 10 CONE bal to crank 62 69 All 3 53 4 53 6V 53 5150087 A R 53 NUT gear and pulley to shaft 1V l8 65 69 All 3 53 4 53 6V 53 5180291 1 50 RETAINER crankshaft pulley 65 69 All D351 D DH478 2485202 1 42 RING crankshaft damper 62 69 All 4 53 5121074 1 40 25 SHAFT balancer 65 69 All D351 D DH478 2472178 1 37 05 SHAFT balancer 65 67 All 3 53 5121073 1 34 32 SHAFT balancer 62 69 All 3 53 4 53 6V 53 5121071 1 2 38 SPACER balancer shaft pulley 58 All 348 59 Ser 7 8 348 60 64 Ser 60 thru 80 63 64 Ser 50 292 65 66 All 327 348 409 65 66 Tilt 283 67 68 All 8 cyl exc TDM 67 68 Ser 50 TDM 327 67 70 All 292 69 70 Ser 40 50 350 3739422 1 35 WASHER balancer l D x 1 O D x Vin thick 65 68 All D351 D DH478 8877268 1 1 65 WASHER balance to crank bolt 65 69 All D351 D DH478 2377808 1 95 WASHER cam bal shaft idler gear thrust 66 70 All 366 427 3864814 1 55 WASHER balancer 62 Ser 60 4 53 5126197 A R 1 69 WEIGHT inner balance shaft gear 62 69 All 3 53 4 53 5109874A Fl 89 WEIGHT outer balance shaft gear 63 69 All 4 53 5119278 2 2 69 WEIGHT inner balancer shaft gear 65 69 All D DH478 2485066 2 8 85 WEIGHT shaft center 65 66 All D351 2485067 2 7 95 WEIGHT shaft center 56 59 All 322 3751840 1 2 40 WEIGHT UNIT balance Note 1 NOTE 1 Required for engine balance when installing late design pistons See Group 0 629 0 666 FLYWHEEL DISC SPACER UNIT w Ring Gear 55 59 All w H T 8 cyl 8617327 1 31 70 168 teeth 55 62 All w H T 6 cyl 2nd Ser 8615574 1 30 05 168 teeth 55 62 All 6 cyl exc A T 3789730 1 21 30 solid type cast 3705410 55 Ser 4 5 6 8 cyl exc A T 56 64 All 8 cyl exc A T 322 327 348 409 H D Clutch 61 Ser 60 w H D Clutch 283 61 Ser 60 w H D Clutch 283 63 64 Ser 50 60 6 cyl exc P T 65 All 230 292 65 All 283 exc P G 66 Ser 50 60 250 283 292 exc A T 0 69 70 Ser 40 250 67 70 Ser 40 283 307 350 3889694 1 24 85 solid type Note 1 56 62 All w P T 6 cyl 3796137 1 43 55 solid type welded ring gear dab of white paint on rear surface 1971 CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORATION P A 31S L REV 6 71 0 31 0 659 0 666