<HEAD> <META content="MSHTML 6.00.2800.1106" name=GENERATOR></HEAD> <BODY> <DIV> <DIV>The 378766 S should be the Ford engineering part number. 378766 S might be the Ford service part number in addition to the engieeering number. I assume the 1 is the cavity number of the mold and that this part comes from a mold that has multiple cavities. My guess is that the FK 89 either stands for the mold number or the manufacturer and the mold number. </DIV> <DIV> </DIV> <DIV>Jim Seisser<BR><BR><BR><BR>-----Original Message----- <BR>From: DMGT350@aol.com <BR>Sent: Apr 27, 2005 10:07 PM <BR>To: shelbymustang@carmemories.com <BR>Subject: 66 PCV Valve Grommet <BR><BR><ZZZHTML><FONT face=arial,helvetica><FONT size=2 PTSIZE="10">OK, here's a picky question for 66 owners, particularly those with original closed letter valve covers, or you judges out there. I'm curious about the numbers on original PCV valve grommets for Cobra closed letter valve covers. The numbers on mine are: "378766 S" followed by "FK 89" and what looks like a "1" off by itself. I have no idea what these numbers mean or how variable they are on original grommets. <BR><BR>Thanks, <BR>Dave McDonald <BR>6S1757</FONT></ZZZHTML> </DIV></DIV></FONT></BODY><PRE> ________________________________________ PeoplePC Online A better way to Internet http://www.peoplepc.com</PRE>