Camaro Research Group Discussion > Originality

Pulley diameters - anyone have these pulleys

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KurtS:
Can you help with this pulley list?
Here is a list of first gen pulleys that we don't have the diameter (list is also on-site). The alternator pulleys don't always have numbers stamped on them so it would have to come from an known original part.
Diameter is simply the OD of the part. (Originally, they would have been measured over steel balls because you care where the belt sits, not the OD.)  Sorry about the column alignment, took work to even get it this nice!
SB is small block, BB is big block, DG is deep groove.

Pulley #   Application     Notes        Year
1969433   Alternator     L6, K76     68
3744043   Crank           SB             67, 68
3755820   Crank           SB     67
3770245   Water pump   DG, Z/28   67, 68
3790337   Crank ext for ps   L6     69
3844100   Alternator      DG, BB   67
3850156   Alternator      L6, 3843346 fan used   67
3853104   Crank ext for ps   L6 with A/C   67
3853400   Crank ext for ps   230 cu in   67
3860457   Power steering         67, 68
3863108   Crank           BB, DG, cast iron   67
3869978   Crank           DG, cast iron   67, 68
3871253   Alternator     L6, cast iron, 3843346 fan used   67
3874412   Crank           BB     67
3874416   Crank ext for ps   BB     67
3876846   Water pump         68
3876872   Crank ext for ps   L6     67, 68, 69
3880886   Power steering    L6     68, 69
3890419   Water pump        67, 68
3909815   Alternator      Fan and pulley are one piece   67
3909817   Alternator                67
3916385   Crank ext for ps   DG, Z/28   67, 68
3921923   Crank           DG, BB   68
3927789   Water pump  L6 with A/C   69
3932498   Crank           w/ PS, unverified usage   69
3937788   Crank           BB, unverified usage   69
3941105   Power steering   DG     69
3947824   Water pump  DG, BB   69
3955290   Crank           BB     69
3955291   Crank           DG, BB   69
3956664   Crank                69

Thanks!
Kurt

HawkX66:
I have a couple of those BB 69 pulleys on my original 396 Kurt. I'll try to grab some measurements for you tonight. My water pump pulley isn't on your list though. Do you want that? 3932402 UD

Water Pump


Crank Pulley
3955290 AD

jdv69z:
Do you want them measured with a tape, or with a calipers? So with a tape it might look like 6 3/4", but it might measure 6.80" with a calipers.

KurtS:
Calipers would be preferred and more accurate, but tape is fine. 
Most pulleys already have a diameter noted - http://www.camaros.org/engine.shtml#PulleySpreadsheet. Just trying to complete the table. :)

Thanks!

stovebolt:
1969433. I bought this NOS pulley for my 1968 L6 Sport Coupe. There are no markings on the pulley. The O.D. is 2.25".

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