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[QUOTE=Ten15]Bruce,
[/QUOTE]
The casting & date numbers for your heads can only be seen with the valve covers off.
If the heads are original, there should be a casting number of 3973487 (only small block head for 1971) and below that should be a date code. An example of a date code would be D231: D=May 23 = 23rd day 1 = 1971.
Anthony
Gotcha,
I have june 9 70 3927185, do you know the info for this head/
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
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# 3927185 = used on MANY different vehicles, with 307/327/350cid, from a '69 Camaro to a '76 Chevy truck...but, unfortunately, never on a Corvette...
The casting date of '70 would exclude it from being for a 327, tho.

The casting date of '70 would exclude it from being for a 327, tho.
Joel Adams
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in Forum: C3 Engines, Driveline and Handling
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