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Old 11-14-2008, 07:27 AM
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GM flywheel casting numbers

Hello All

I have a few flywheels I would like to know what they originally came
on. I can't find the info I need on the net and don't have books that
cover them. Does anyone have any info for me?
I tried to decipher the numbers as best as possible, but some were rusty
and hard to read... They are as follows


L284 3714463
K292 3973456N
H275 3729004
2778819

Thanks for any help....

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Old 11-15-2008, 11:13 AM
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3714463 seems to be 348ci / 409ci 168 Tooth
3973456N Internal balance 168 Tooth (BBC and SBC)
3729004 168T: 56-62, 77-78 vette, 59-64 Impala 283,348,409 except 425h/ used with 10" clutch
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