Thread: 3993820 casting heads
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08-16-2004 04:53 PM #1
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- Jun 2004
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- Ushuaia
- Car Year, Make, Model: 66 Chevrolet Chevy II SS
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3993820 casting heads
I´ve been offered a set of BB heads with this casting number, how they compare to 049 and 781's? the only difference seems to be they have 113cc ports instead of 119cc, the rest (ports, valves) appear to be the same.
Thanks
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