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RE: 390 & 428 heads
By joe dula - 03/14/2002 10:59:47 PM; IP 198.81.16.182
yes they are interchangeable. bore diameters are 4.05 and 4.13 on the 390 and 428. standard valve diameters are 2.02int, 1.55 exh most 390's. 2.08 and 1.6 on 428 cj. there are some minor diffs in chamber cc's and exhaust manifold bolt patterns.
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Collapse <a href=../ForumFE/reply.aspx?ID=12006&Reply=12006><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor12006" onclick="return false;">390 & 428 heads</a>&nbsp;-- <font color=#0000ff>Marc, <i>03/14/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=12006', contentMargin: 60, icon: $('anchor12006') }); </script>  390 & 428 heads -- Marc, 03/14/2002
 RE: 390 & 428 heads -- Mike McQuesten, 03/14/2002
RE: 390 & 428 heads -- joe dula, 03/14/2002
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