Big Block Head Casting Numbers - Chevelle Tech
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post #1 of 5 (permalink) Old Apr 26th, 10, 9:42 PM Thread Starter
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Mark
 
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Big Block Head Casting Numbers

casting number # 3983820 is what head and what year?
thanks
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post #2 of 5 (permalink) Old Apr 26th, 10, 9:52 PM
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Ethan
 
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Re: Big Block Head Casting Numbers

3983820 heads are for '71 402's and 454's BBC.

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post #3 of 5 (permalink) Old Apr 26th, 10, 10:12 PM Thread Starter
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Mark
 
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Re: Big Block Head Casting Numbers

thanks,
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post #4 of 5 (permalink) Old Apr 27th, 10, 11:13 AM
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Chris
 
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Re: Big Block Head Casting Numbers

Not so fast. First I believe you have the number wrong. You also need the casting date to tell what year they were made. From MORTEC.com:
3993820....71-84...oval...OPEN...454 Passenger and Trucks, 113cc chamber, 255/114 ports
3993820....71......oval...OPEN...402, 113cc chamber, 255/114 ports


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post #5 of 5 (permalink) Old Apr 27th, 10, 11:18 AM
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Lance
 
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Re: Big Block Head Casting Numbers

All of the info you will ever want to know!

http://www.mortec.com/

ACES #08588

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