I have a 78 firebird with a 400 engine with 6x 4 heads, trying to find out what compression I have.
This car will be a drag strip car only and am looking for an aftermarket intake... (currently have a holley 750dp carb and headers going into sidepipes are the only modifications)also wondering about springs/valves/cam. Thanks for you input and remember this is a LOW :-) budget racer....Thanks Jack
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