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Old 10-05-2009, 06:45 PM   #1
BillK
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Default Re: SB Chevy head question

3731539....57......283..........283 HP FI

3703523....55......265


http://www.mortec.com/castnum.htm
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Old 10-05-2009, 07:45 PM   #2
FED 387
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Exclamation Re: SB Chevy head question

3703523 head
1955--- 265 -----172 int 150 ex----195 hp

3731539 head
1957----283------172 int 150 ex----283 HP FI Corvette
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