68 All w Acc Air Cond 6 cyl 3790337 1 2 55 PULLEY stamped 3790337 1 groove 6 0 D 3 holes 63 70 All Blazer 283 307 327 350 exc 62 amp Air Cond H D Cooling A I R 3755820 1 1 60 PULLEY stamped 3755820 1 groove 6 x z thk 12 holes V 63 4 WD 283 2nd Series w 62 amp 63 All w 62 amp 8 cyl exc 4 WD 64 70 All Blazer w 62 amp Air Cond H D Cooling A I R 283 307 327 350 3747479 1 3 50 PULLEY stamped 3747479 2 groove 6 O D x Wu thk 9 holes 65 70 All 292 3865792 1 5 95 PULLEY front stamped 3865792BN 1 groove 6 0 D x 1 thk 3 holes 66 70 All Blazer 250 3883263 1 3 20 PULLEY stamped 3883263 1 groove 6 O D x Vt thk 3 holes 66 67 All w P S 283 327 3876326 1 8 30 PULLEY front stamped 3876326 2 grooves 6 O D x 2V2 thk 6 holes 67 69 All Blazer w 62 amp Air Cond A R 283 307 327 350 exc P S 70 Ser 20 30 307 exc D D P S 70 Ser 20 30 D D 307 350 exc P S 3751232 1 2 30 PULLEY front stamped 3751232 1 groove 6 O D x 1 thk 9 holes 68 Ser 10 w Acc Air Cond 8 cyl 3850838 1 3 50 PULLEY stamped 3850838BG 2 groove 7 O D x IV32 thk 9 holes 68 70 All w P S 307 327 350 3923898 1 8 05 PULLEY front stamped 3923898 2 groove 6 O D x 2 Vaz 1Zhk 5 holes and 4 spokes 68 70 All 396 exc Air Cond 3874418 1 3 65 PULLEY front stamped 3874418 2 groove 6 z O D x 1V4 thk 5 holes 68 70 All w Air Cond 396 3874414 1 2 80 PULLEY stamped 3874414 2 groove 7 V3 O D x 1 thk 5 holes 68 70 All w P S 396 3925525 1 1 80 PULLEY front stamped 3925525 1 groove 6 0 D x 2V thk 5 holes 63 66 All w forged crankshaft V 283 67 4 WD G 10 20 w forged crankshaft 283 3795272 1 7 90 HUB pulley or balance 4 dia 63 65 All 3788523 1 6 40 HUB pulley 4 dia 65 66 All w key V4 long x Vu wide x V4 high 3883206 A R 15 KEY crankshaft pulley hub Note 7 65 66 All w key 1 long x wide x Wu high 3885092 1 15 KEY crankshaft pulley hub Note 7 NOTE 7 Used with pulleys and hubs having a shallow Via deep keyway only All full depth Va slots take standard Woodruff key 106751 two short or 144542 one long in group 8 960 NOTE 1 Assemblies are solidly bolted for driving balancer onto crankshaft when special driving tool is not available Bolts must be removed after balancer is assembled to engine 0 662 NUT RETAINER SCREW ASSY SHAFT SPACER WASHER WEIGHT Harmonic Balancer and Crankshaft Pulley 67 70 All 3 53 5150087 2 53 gear and pulley 1V 18 67 70 All 3 53 5180291 1 55 RETAINER pulley 62 65 All 4 cyl 3793100 2 10 SCREW ASSY w Iockwasher 24 x Wu 63 65 All 4 cyl 3793101 1 10 SCREW ASSY w Iockwasher Vu 24 x Vu 67 70 All 3 53 5121073 1 34 32 SHAFT balancer 67 70 All 3 53 5121071 1 2 38 SPACER balancer shaft pulley 63 69 All 292 70 All Blazer 292 307 350 3739422 1 40 WASHER balancer 68 70 All 396 3864814 1 55 WASHER balancer 67 70 All 3 53 5109874 2 89 WEIGHT shaft gear 0 666 FLYWHEEL with Ring Gear 42 53 V2 Ton exc H D Clutch 3705385 1 15 80 55 59 Ser 3 w H T 8 cyl 8617327 1 31 70 168 teeth 55 62 All w 10 Clutch 6 cyl exc A T 63 4 WD 6 cyl 1st Ser w 10 Clutch 3705409 1 23 45 solid type 55 62 All w 11 Clutch 6 cyl t 1971 CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORATION P A 31 0 659 0 666 0 20 REV 6 71