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#1
04-28-2008, 04:18 PM
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BB head specs needed - 6272990
I have a set of "990" heads, 1973 dates, that I need info. on. These heads are not listed in any of the books I have and I am trying to determine the specs. and their application. Why are these heads not listed in the Colvin book? Are they common heads and, if not, what are they worth? Thanks.
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'70 L78 NOVA SS '77 Bronco 
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#2
04-28-2008, 04:42 PM
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Re: BB head specs needed - 6272990
6272990 1971-94 454 Open 425, 118.0cc, IP 325cc
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#4
04-28-2008, 09:42 PM
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Re: BB head specs needed - 6272990
Joe , Open chambers w 219 188 valves[basically L88 iron heads] they are around 400-600 for cores 900/1000 or so done..not a numbers head
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