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Darn good idea. Here is a couple of thoughts.
By James - 07/08/2003 3:28:17 AM; IP 66.139.156.50
The motor sets tilted up in the front so gravity makes the oil run to the back of the head and down the back drain for about %90 of the oil. The front one really sees very little oil. I know that if you enlarge both holes that you do not have to worry about which side you put the head on during assemble but here is a thought. You can save some time and money by just doing one on each head and making sure that the enlarged one goes on the back. I have had a cut out cover on mine just to watch how it works while it is running. I know...I get carried away.

I am thinking it was Royce Peterson that researched this and stated on a post a while back that the oil drain hole is smaller and moved from the original CJ design position slightly to allow for carnivious port work on that runner which had been an issue on the original heads. I wish that mine was at least one drill bit size bigger than what is there. Anything will help as it has a tendancy to puddle there real bad and drown the back couple of valve seals leading to an oil consumption problem I am sure.

Mine will be enlarged if I ever have to take it apart.
This thread, so far...
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Collapse <a href=../ForumFE/reply.aspx?ID=17702&Reply=17702><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor17702" onclick="return false;">edelbrock alum heads</a>&nbsp;-- <font color=#0000ff>WAYNE S., <i>07/07/2003</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=17702', contentMargin: 60, icon: $('anchor17702') }); </script>  edelbrock alum heads -- WAYNE S., 07/07/2003
 I've often seen 'em chamfered, but not enlarged. [n/m] -- Mr F, 07/07/2003
Collapse <b>Darn good idea. Here is a couple of thoughts.</b>&nbsp;-- <font color=#0000ff>James, <i>07/08/2003</i></font>Darn good idea. Here is a couple of thoughts. -- James, 07/08/2003
Collapse <a href=../ForumFE/reply.aspx?ID=17711&Reply=17702><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor17711" onclick="return false;">RE: Darn good idea. Here is a couple of thoughts.</a>&nbsp;-- <font color=#0000ff>Al Phillips, <i>07/08/2003</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=17711', contentMargin: 60, icon: $('anchor17711') }); </script>  RE: Darn good idea. Here is a couple of thoughts. -- Al Phillips, 07/08/2003
 Something about that sounds risky. -- james, 07/08/2003
 I cut a valve cover in half too..... -- Royce Peterson, 07/09/2003
Collapse <a href=../ForumFE/reply.aspx?ID=17728&Reply=17702><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor17728" onclick="return false;">RE: edelbrock alum heads</a>&nbsp;-- <font color=#0000ff>390 ranger, <i>07/08/2003</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=17728', contentMargin: 60, icon: $('anchor17728') }); </script>  RE: edelbrock alum heads -- 390 ranger, 07/08/2003
 RE: edelbrock alum heads -- 67stang, 07/09/2003
 Btw -- Royce Peterson, 07/10/2003
 One last thought -- James, 07/10/2003
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