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12552520 vortec?

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Old 07-14-2009, 09:31 PM   #1
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12552520 vortec?

what is the info on these heads i cant really find anything i am mainly wondering the cc thanks
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Old 07-14-2009, 09:57 PM   #2
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Re: 12552520 vortec?


this thread states that they're 58cc combustion chamber, with 1.84/1.5 valves. It says that there were 2 different heads offered on that 305 and the other style was 64cc.
Old 07-16-2009, 06:58 PM   #3
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Re: 12552520 vortec?

ok thanks i was searchin alot of places and finding nothing
one thing i did find was sayin it was a 350 97+ so i was scared for a sec
i bought these fresh out of the machine shop ready to bolt on for 150 w/ valve covers for my 305
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