Pulley ID Chart - Chevelle Tech
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post #1 of 9 (permalink) Old Aug 4th, 17, 8:57 PM Thread Starter
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Pulley ID Chart

Anyone have a pulley ID chart listing the original part numbers for say 1968-1972 Chevelles ? Ive been trying to determine correct part numbers and cant seem to nail It down .
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post #2 of 9 (permalink) Old Aug 4th, 17, 9:30 PM
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Re: Pulley ID Chart

What number alternator do you need the pulley to fit? I have old Delco and Chevrolet/GM catalogues and can look it up for you.

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post #3 of 9 (permalink) Old Aug 4th, 17, 10:04 PM
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Re: Pulley ID Chart

68 was short water pump, 69-72 are long water pump engines, Just an FYI!!

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post #4 of 9 (permalink) Old Aug 4th, 17, 11:20 PM
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Re: Pulley ID Chart

Quote:
Originally Posted by byf41 View Post
Anyone have a pulley ID chart listing the original part numbers for say 1968-1972 Chevelles ? Ive been trying to determine correct part numbers and cant seem to nail It down .
Model year and Engine?
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post #5 of 9 (permalink) Old Aug 5th, 17, 1:10 AM Thread Starter
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Re: Pulley ID Chart

Its for a project car Im putting an LS6 In . Id like to go with 1970-1971 BB pulleys with long water pump . No a/c but with p/s . Not necessarily deep groove , standard will do . On the crank pulley Im seeing #3955290 and also #3956666 as possibilities . I have a #3770509 p/s pulley and was thinking the #3995631 water pump pulley should be a match . I have a standard alternator with pulley and fan on It . I looked through my by the number books but they skipped over pulleys for some reason .

Last edited by byf41; Aug 5th, 17 at 1:13 AM. Reason: incomplete
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post #6 of 9 (permalink) Old Aug 5th, 17, 9:11 AM
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post #7 of 9 (permalink) Old Aug 6th, 17, 8:59 AM
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Re: Pulley ID Chart

some info from build sheets and parts manuals: note the build sheet codes are usually the letters following the stamped number on the pulley.

fan pulley:
build sheet code (box 22)
AE-L22 6 cyl engine
BT-L78 engine
BV-L78/COPO engine
DU-307 engine/L48/L35/ L34 engine
DV-L78
DW-LM1/L48 350 engine/L35

Part no#
3927796 6 Cyl
3927797 RHD 6 cyl
3927789 6 cyl w/C60
3932402 V-8
3976059 V-8 w/C60
3932430 V-8 w/C60

crank pulley
build sheet code (box 35)
AA-L35/L34 engine
AB-L78/COPO engine
AC-L35 w/AC-N40
AD-L35/L34 w/N40
AG-307 engine w/N40
AG-L48 w/N40
CE-L48 w/N40
CH-LM1 350 w/AC-N40
CN-L48 350 engine w/AC-N40

Part No#
3876872 6 cyl w/C60
3956664 V-8
3932428 396 w/C60
3972180 307/350 w/C60
3790337 6 cyl w/M35
3870872 6 cyl w/C60 & M35
3956666 8 cyl base & w/M35
3959290 396

power steering pulley
build sheet code (box 34)
CE-307 engine/L35/L34 engine
CI-L22 engine
DE-LM1/L48 350 engine/L35

i dont have part numbers for power steering pulleys

hope this helps, take care Andy

Andy
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post #8 of 9 (permalink) Old Aug 6th, 17, 11:43 AM Thread Starter
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Re: Pulley ID Chart

So Is It safe to say that small block and big block pulleys will Interchange with same length water pump If not concerned about numbers matching ? Diameters and spacing would be the same ?
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post #9 of 9 (permalink) Old Aug 6th, 17, 12:19 PM
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Re: Pulley ID Chart

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Originally Posted by byf41 View Post
So Is It safe to say that small block and big block pulleys will Interchange with same length water pump If not concerned about numbers matching ? Diameters and spacing would be the same ?
Don't mix pulleys made for a short water pump system with pulleys made for a long water pump system since they are different depths.

A small block crank pulley can be used on a big block, but a big block crank pulley won't (without being modified) fit on a small block. Alternator pulleys, for the most part, are all interchangeable, no matter what water pump is being used.

Otherwise, swap to your heart's desire.

Jon N.

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