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What Just One and Ex said...
I wonder if you have as much cam as you believe you do. I have a similar set up but run bigger valves and 1320 cfm. I make 535 at the crank.. I'm not knocking your hp. I'd say it's close to 475-495. at the crank... But at 13:1 you should be close to 550 or better.
Hotrod Magazine built a 390 that went 9.7:1 and got 450 hp at the crank. It was a roller cam motor that had 222 / 228 degrees of duration with .584/.604" of lift...
http://www.hotrod.com/webonly_january/
So I dunno.
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michael
A man that is young in years, may be old in hours, if he have lost no time. But that happeneth rarely. Generally, youth is like the first cogitations, not so wise as the second. For there is a youth in thoughts, as well as in ages... Sir Francis Bacon (1561-1626)
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