Original Message
That is a serious mismatch.
By Royce P - 10/14/2005 7:51:35 AM; IP 207.69.139.7
Those heads have different size combustion chambers and different port sizes. Neither is a high performance head. Both are common variants. You should try to find one of either type to make a pair.

Don't try using them together, the engine will not run right. It will have a fundamental out of balance in compression that will be very annoying.

Royce
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Collapse <a href=../ForumFE/reply.aspx?ID=25930&Reply=25930><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor25930" onclick="return false;">I have the opportunity to buy a 390 engine</a>&nbsp;-- <font color=#0000ff>Justin G, <i>10/10/2005</i></font><script type="text/javascript">
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 I have the opportunity to buy a 390 engine -- Justin G, 10/10/2005
Collapse <a href=../ForumFE/reply.aspx?ID=25940&Reply=25930><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor25940" onclick="return false;">C7AE-A and C6AE-6090R heads</a>&nbsp;-- <font color=#0000ff>Justin G, <i>10/10/2005</i></font><script type="text/javascript">
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 C7AE-A and C6AE-6090R heads -- Justin G, 10/10/2005
Collapse <a href=../ForumFE/reply.aspx?ID=25976&Reply=25930><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor25976" onclick="return false;">Sorry to ask again but anyone know if I would have</a>&nbsp;-- <font color=#0000ff>Justin G, <i>10/14/2005</i></font><script type="text/javascript">
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 Sorry to ask again but anyone know if I would have -- Justin G, 10/14/2005
Collapse <b>That is a serious mismatch.</b>&nbsp;-- <font color=#0000ff>Royce P, <i>10/14/2005</i></font>That is a serious mismatch. -- Royce P, 10/14/2005
 Thanks Royce! n/m -- Justin G, 10/14/2005
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