53 exc SDL Conv 54 exc Conv 3701055 1 2 0 L 53 dev length stamped 3701055 55 56 8 cyl exc Conv dual exh 3714331 1 stamped 3714331 55 56 8 cyl exc dual exh 3708723 1 crossover pipe w flanges 55 57 6 cyl exc Conv 3714333 1 stamped 3714333 55 56 w 4BC Ist design exc Conv 55 56 Conv w 4BC 3714631 1 L H w 2 hole flange stamped 3714631 55 56 w 4BC Ist design exc Conv 55 56 Conv w 4BC 3714636 1 R H w 2 hole flange stamped 3714636 56 w 4BC 2nd design exc Conv 3732957 1 L H w 2 hole flange stamped 3732957 Note 2 NOTE 2 Used w muffler 3756559 to supersede 1st design pipe 3714631 and muffler 3719457 56 w 4BC 2nd design exc Conv 3732958 1 R H w 2 hole flange stamped 3732958 Note 3 NOTE 3 Used w muffler 3756559 to supersede Ist design pipe 3714636 and muffler 3714634 56 w dual 4BC exc Conv 3735491 1 L H w 3 hole flange stamped 3735491 56 w dual 4BC exc Conv 3735492 1 R H w 3 hole flange stamped 3735492 57 w 2BC exc Conv 3741253 1 19V2 long stamped 3741253 57 w 4BC dual 4BC F l exc Conv 3747015 1 L H 29 O L w 3 hole flange 57 w 4BC dual 4BC F l exc Conv 3747016 1 R H 29 O L w 3 hole flange 57 Conv w 2BC 3751949 1 57 Conv w 4BC dual 4BC F l 3734460 1 R H 38 gz dev length w 3 hole flange 57 w 2BC 3734403 1 exhaust and crossover w flanges 57 w 4BC dual 4BC F l 3743232 1 R H exhaust crossover 58 6 cyl 3752413 1 stamped 3752413 58 w dual exh 3752412 1 R H stamped 3752412 58 64 283 exc dual exh 3752900 1 exhaust crossover w extensions 58 w dual exh 283 3752336 1 exhaust crossover w extensions 58 8 cyl 1 L H 28 dev length 59 64 283 exc dual exh 3785803 1 stamped 3785809 58 59 Pass 348 3752899 1 59 60 6 cyl 3760515 1 59 61 w dual exh 283 62 64 327 exc H Per 3785809 1 L H 17 O L stamped 3785809 59 61 w dual exh 283 62 64 327 exc H Per 3785810 I R H 41 dev length stamped 3785810 59 348 exc H Per Sp H Per 60 348 61 348 exc H Per Sp H Pen 61 H Per w H L Cam 348 3785806 1 R H 39 dev length stamped 3785806 59 348 exc H Per 60 348 61 348 exc H Per Sp H Per 61 H Per w H L Cam 348 3785805 1 L H 38 dev length stamped 3785805 59 61 w H Per Sp H Per 348 61 64 409 exc H Per dual 4BC 3830473 1 L H 38 M dev length 59 61 w H Per Sp H Per 348 61 64 409 exc H Per dual 4BC 3830474 1 R H 38 N dev length 61 62 6 cyl 3785801 1 35 dev length stamped 3785801 61 63 w dual 4BC 409 3822963 L H 33 dev length use w 3822923 Note 4 61 63 w dual 4BC 409 3822964 R H 29 I dev length use w 3822924 Note 4 NOTE 4 Used with dual 4BC conversion installation to match original production welded type muffler exhaust pipe assy only Separate service muffler not listed for these pipes Use muffler and exhaust pipe assys 3831967 left 3831968 right or separate service exhaust pipes 3838311 left 3838312 right with mufflers 3852809 left 3852810 right as required 62 64 w H Per 327 3830476 R H used w 2V exh system 62 64 w H Per 327 3830475 L H used w 2V2 exh system 63 64 6 cyl 3844137 1 63 64 w H Per dual 4BC 409 3838311 L H 63 64 w H Per dual 4BC 409 3838312 R H 1970 CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORATlON P A 30 3 609 3 609 3 14