69 G 20 Panel w A l R 307 70 Ser 10 4 WD 307 350 70 Ser 20 4 WD 350 70 Blazer 4 WD 307 350 left or right 70 G 10 307 3989036 1 20 15 right l 69 Ser 10 w A T 307 350 69 Ser 20 Sub w A T 307 350 69 Ser 20 30 w A l R 307 350 exc 4 WD 70 Ser 10 Conv 307 350 70 Ser 20 30 350 exc 4 WD 70 Blazer Conv 307 350 3932473 L H 20 15 left 69 Ser 10 307 350 exc AT 69 Ser 20 Sub 307 350 exc A T 69 Ser 20 30 307 350 exc Sub A I R 4 WD 70 Ser 20 30 307 exc 4 WD 3932469 L H 22 75 left 3 602 SUPPORT Manifold 67 G 10 20 4 WD 283 exc A I R 3845516 L H 40 exhaust left 3 604 LOCK Exhaust Manifold Bolt Locking 57 62 All 63 Ser 10 thru 30 w Cool Pack 283 327 64 66 All w Air Cond 8 cyl 67 70 All Blazer 283 307 327 350 3880844 4 05 end bolt 2 2 ctr to ctr of holes w locking tangs 3 609 PIPE Engine to Muffler Exhaust NOTE Refer to group 3 701 for chart containing 1968 1970 exhaust pipes and crossovers Comm Util and Ser 3 41 46 Comm 3656596 1 8 25 dev length 83 stamped 3656596 47 48 Comm exc D D 3684108 1 8 25 dev length 83 stamped 3684108 49 Comm exc D D 3691277 1 8 55 dev length 82 stamped 3691277 50 53 Comm 216 3693712 1 8 90 dev length 79 stamped 3693712 50 55 D D 1st Ser 3693714 1 8 55 dev length 63 stamped 3693714 54 55 Comm 1st Ser exc D D 3693715 1 9 00 dev length 79 stamped 3693715 55 56 Ser 3 8 cyl exc dual exh 3708723 1 1 1 50 crossover pipe w flanges 55 57 Ser 3 6 cyl 2nd Ser exc D D 3732326 1 8 60 w flange stamped 3732326 55 56 Ser 3 8 cyl 3725672 1 8 20 stamped 3725672 55 62 D D 6 cyl 2nd Ser exc 102 W B 3732324 1 7 40 stamped 3732324 57 D D 8 cyl 3742205 1 9 65 47V4 O L 57 Ser 3 8 cyl exc D D 58 59 Ser 3 8 cyl exc Stake 3742207 1 10 10 61 O L 57 59 Ser 3 8 cyl exc 4BC 3756556 1 14 90 exhaust crossover 58 59 Ser 3 6 cyl exc D D 3752513 1 8 15 w flange stamped 3752513 58 59 Ser 3 Stake 8 cyl 3752511 1 11 30 stamped 3752511 Ser 10 60 66 283 3752900 1 11 35 exhaust crossover w extension 60 62 w 115 W B 6 cyl exc 4 WD 3767167 1 10 90 98 6 dev length 60 62 w 115 W B 8 cyl exc 4 WD 3767168 1 10 55 82V dev length 60 63 4 WD 6 cyl 1st Ser 3773642 1 8 50 56V dev length 60 63 4 WD 8 cyl 1st Ser 3773644 1 13 25 4OV dev length 60 62 w 127 W B 6 cyl exc 4 WD D D 3769313 1 11 15 110 Vis dev length 60 62 w 127 W B 8 cyl exc 4 WD D D 3769314 1 10 90 94V dev length 61 62 D D 3819131 1 9 95 86Vz dev length 63 64 D D 4 cyl 3831080 1 1971 CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORATlON P A 31 Y Y 3 601 3 609 3 52 REV 6 71