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RE: 390 to 427, do you mean 428?
By KarlJay - 09/10/2000 7:51:32 AM; IP 204.30.196.9
The bore and strokes are:
390: 4.05 x 3.78
427: 4.23 x 3.78
428: 4.13 x 3.984

Putting a 428 crank in a 390 makes it a 410, you MIGHT be able to bore your 390 80 over to make it a 428, but you should sonic check first.

The 410, 428 are externaly balanced and require a different flywheel. The 390, 427 are internally balanced.
I've heard someone say that some of the old 390 blocks were used for the 427 center oilers but I don't know this to be a fact, anyway, you need the flywheel (McLeod # 463211) and then have the whole thing balanced. Make sure that you get the proper piston pin height, 410 or 428 or custom
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Collapse <a href=../ForumFE/reply.aspx?ID=2682&Reply=2682><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor2682" onclick="return false;">390 to 427</a>&nbsp;-- <font color=#0000ff>Terry, <i>09/08/2000</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=2682', contentMargin: 60, icon: $('anchor2682') }); </script>  390 to 427 -- Terry, 09/08/2000
Collapse <b>RE: 390 to 427, do you mean 428?</b>&nbsp;-- <font color=#0000ff>KarlJay, <i>09/10/2000</i></font>RE: 390 to 427, do you mean 428? -- KarlJay, 09/10/2000
 RE: 390 to 427, do you mean 428? -- rich, 09/10/2000
 RE: 390 to 427, do you mean 428? -- Terry, 09/10/2000
Collapse <a href=../ForumFE/reply.aspx?ID=2696&Reply=2682><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor2696" onclick="return false;">RE: 390 to 427</a>&nbsp;-- <font color=#0000ff>Paul, <i>09/10/2000</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=2696', contentMargin: 60, icon: $('anchor2696') }); </script>  RE: 390 to 427 -- Paul, 09/10/2000
Collapse <a href=../ForumFE/reply.aspx?ID=2701&Reply=2682><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor2701" onclick="return false;">RE: 390 to 427</a>&nbsp;-- <font color=#0000ff>Terry, <i>09/10/2000</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=2701', contentMargin: 60, icon: $('anchor2701') }); </script>  RE: 390 to 427 -- Terry, 09/10/2000
Collapse <a href=../ForumFE/reply.aspx?ID=2735&Reply=2682><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor2735" onclick="return false;">RE: 390 to 427</a>&nbsp;-- <font color=#0000ff>Paul, <i>09/13/2000</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=2735', contentMargin: 60, icon: $('anchor2735') }); </script>  RE: 390 to 427 -- Paul, 09/13/2000
 RE: 390 to 427 -- terry, 09/14/2000
Collapse <a href=../ForumFE/reply.aspx?ID=2769&Reply=2682><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor2769" onclick="return false;">RE: 390 to 427</a>&nbsp;-- <font color=#0000ff>wrench, <i>09/17/2000</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=2769', contentMargin: 60, icon: $('anchor2769') }); </script>  RE: 390 to 427 -- wrench, 09/17/2000
 RE: 390 to 427 -- terry, 09/21/2000
Collapse <a href=../ForumFE/reply.aspx?ID=2848&Reply=2682><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor2848" onclick="return false;">RE: 390 to 427</a>&nbsp;-- <font color=#0000ff>wrench, <i>09/22/2000</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=2848', contentMargin: 60, icon: $('anchor2848') }); </script>  RE: 390 to 427 -- wrench, 09/22/2000
 RE: 390 to 427 -- terry, 09/22/2000
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