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03-18-2007, 01:41 AM
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#1 |
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Registered User
Join Date: Jan 2007
Location: shoreline, wa
Posts: 1,565
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casting numbers
so i looked up the numbers of an old set of heads i had in the garage and it my sorce says that they are from a 68 307/327 70cc chamber but does not tell the valve size what does the 70 cc chamber mean ???
the number is 3911032 |
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03-18-2007, 02:14 AM
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#2 |
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Senior Member
 
Join Date: Dec 2006
Location: Studio City, Calif.
Posts: 2,883
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Re: casting numbers
http://www.nastyz28.com/sbchevy/sbch.html
Looks like they are to a 307 or 350 from '68-69 with the small 1.72 intake and 1.5 exhaust valves. A 70 cc or 76 cc chamber refers to the size of the combustion chamber in the head where the initial combustion takes place.
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'69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme. |
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