O 000 0 9 J 3 2 l 8 cylinder Drive Pulley Crankshaft Groove No 3 3 pulley systems Driven Dimensions Pulleys 58 Pass Air S w Air Cond 283 54 A W 3861946 1 58 Pass Air S w Air Cond 348 55V A W 3849739 1 59 Pass Air S w Air Cond 8 cyl 52 A W 3932330 1 60 Pass P S w Air Cond 2nd design 283 61 Pass P S w Air Cond 283 42Vz P W 3888453 1 60 Pass P S w Air Cond lst design 283 60 61 Pass P S w Air Cond 348 60 Pass w P S 8 cyl exc Air Cond 61 Pass w 30 35 amp P S 283 1st design exc L C l 61 Pass w 40 amp 50 amp L C I P S 283 1st design 61 62 Pass w P S 409 63 Pass P S w Air Cond 409 7 43 P W 3770513 1 61 Pass w 30 35 amp P S 283 2nd design exc L C 61 Pass w 40 amp 50 amp L C I P S 283 2nd design 61 63 Pass P S w Air Cond exc 409 62 64 Pass w P S exc 409 35 P 3848263 1 The design difference is a result of the relocation of the Power Steering Pump 61 Pass w P S 348 7 45 P W 3878244 1 63 Pass w P S 409 exc C A C 64 Pass P S w Air Cond 409 44Vz P W 3851318 1 64 Pass w P S 409 exc Air Cond 44 P W 3953786 1 1 069 PUMP UNIT Engine Coolant 41 52 Pass 3774210 1 pulley V V wide pulley stamped 838905 Note 1 53 54 Pass 3774211 1 pulley V wide Note 1 58 64 Pass 348 409 1st design exc RPO Z11 3774213 1 Note 1 55 61 Pass 6 cyl 62 Pass 235 3774186 1 less pulley Note 1 2 NOTE 2 On 55 56 models 3838094 reducing nipple must be used 1970 CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORATION P A 3OT 1 062 1 069 1 10