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Original Message
It sounds like a 1966 engine.
By Dave Shoe - 10/16/2002 7:09:14 PM; IP 12.104.160.195
The "S" intake is found on most all FE cars from 1966-1971. It came in both two barrel and 4 barrel form. Neither are performance pieces.

There were no staggered exhaust manifolds in 1965, so you've got the 1966 variety. Assuming both have C6 on them it's necessarily from a 1966 Fairlane, but it could be a 2V, 4V (non GT) or GT engine. If only one has C6 and the other has C7, then it's likely a 1967-later set.

The date code cast on the heads suggests they are 1966 model year issue. If you have the non-rotating valve retainers (machined one piece reainers), then it's from a 390GT engine. If they are the 20piece "rotating" style of stamped steel retainer, then they are not from a GT engine.

A for being legit, I'd be more concerned about the car, becuase you can find the ingredients of a 390GT engine with little effort. The cars, however, are getting tougher to come by.

Shoe.
This thread, so far...
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Collapse <a href=../ForumFE/reply.aspx?ID=14849&Reply=14849><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor14849" onclick="return false;">One more - trying to validate 390 GT!!</a>&nbsp;-- <font color=#0000ff>Patrick, <i>10/16/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=14849', contentMargin: 60, icon: $('anchor14849') }); </script>  One more - trying to validate 390 GT!! -- Patrick, 10/16/2002
Collapse <b>It sounds like a 1966 engine.</b>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>10/16/2002</i></font>It sounds like a 1966 engine. -- Dave Shoe, 10/16/2002
Collapse <a href=../ForumFE/reply.aspx?ID=14854&Reply=14849><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor14854" onclick="return false;">RE: It sounds like a 1966 engine.</a>&nbsp;-- <font color=#0000ff>Patrick, <i>10/17/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=14854', contentMargin: 60, icon: $('anchor14854') }); </script>  RE: It sounds like a 1966 engine. -- Patrick, 10/17/2002
Collapse <a href=../ForumFE/reply.aspx?ID=14855&Reply=14849><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor14855" onclick="return false;">I'm guessing switched, but dates would help. [n/m]</a>&nbsp;-- <font color=#0000ff>Mr F, <i>10/17/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=14855', contentMargin: 60, icon: $('anchor14855') }); </script>  I'm guessing switched, but dates would help. [n/m] -- Mr F, 10/17/2002
Collapse <a href=../ForumFE/reply.aspx?ID=14856&Reply=14849><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor14856" onclick="return false;">RE: I'm guessing switched, but dates would help. [n/m]</a>&nbsp;-- <font color=#0000ff>Patrick, <i>10/17/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=14856', contentMargin: 60, icon: $('anchor14856') }); </script>  RE: I'm guessing switched, but dates would help. [n/m] -- Patrick, 10/17/2002
 'C6'-etc. is not a date. Here's where to look on the intake... -- Mr F, 10/17/2002
Collapse <a href=../ForumFE/reply.aspx?ID=14865&Reply=14849><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor14865" onclick="return false;">...and here's a similar look at the exhaust manifolds.</a>&nbsp;-- <font color=#0000ff>Mr F, <i>10/17/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=14865', contentMargin: 60, icon: $('anchor14865') }); </script>  ...and here's a similar look at the exhaust manifolds. -- Mr F, 10/17/2002
Collapse <a href=../ForumFE/reply.aspx?ID=14905&Reply=14849><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor14905" onclick="return false;">RE: ...and here's a similar look at the exhaust manifolds.</a>&nbsp;-- <font color=#0000ff>Patrick, <i>10/21/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=14905', contentMargin: 60, icon: $('anchor14905') }); </script>  RE: ...and here's a similar look at the exhaust manifolds. -- Patrick, 10/21/2002
Collapse <a href=../ForumFE/reply.aspx?ID=14908&Reply=14849><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor14908" onclick="return false;">1968 390GT heads are drilled for Thermactor.</a>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>10/21/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=14908', contentMargin: 60, icon: $('anchor14908') }); </script>  1968 390GT heads are drilled for Thermactor. -- Dave Shoe, 10/21/2002
 RE: 1968 390GT heads are drilled for Thermactor. -- brian, 01/09/2006
 RE: It sounds like a 1966 engine. -- Patrick, 10/29/2002
Collapse <a href=../ForumFE/reply.aspx?ID=14853&Reply=14849><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor14853" onclick="return false;">Any date codes on intake & exhaust manifolds? [n/m]</a>&nbsp;-- <font color=#0000ff>Mr F, <i>10/17/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=14853', contentMargin: 60, icon: $('anchor14853') }); </script>  Any date codes on intake & exhaust manifolds? [n/m] -- Mr F, 10/17/2002
 The date codes are against the head/block...... -- kevin, 10/17/2002
Collapse <a href=../ForumFE/reply.aspx?ID=24246&Reply=14849><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor24246" onclick="return false;">RE: One more - trying to validate 390 GT!!</a>&nbsp;-- <font color=#0000ff>Kevin John Conley, <i>03/09/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=24246', contentMargin: 60, icon: $('anchor24246') }); </script>  RE: One more - trying to validate 390 GT!! -- Kevin John Conley, 03/09/2005
 RE: One more - trying to validate 390 GT!! -- giacamo, 03/09/2005
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