Dave, I didn't even get into the fact there are AC valve covers. What I have listed are three NON-AC covers for the left side of the 392 with dual quads. There are several more valve covers for the AC-optioned cars! Wayne -----Original Message----- From: David Schwandt [mailto:finsrus@xxxx] Sent: Friday, January 25, 2002 6:45 AM To: Wayne Graefen; Intl Club 300 Subject: Re: Another 300C restoration detail poll: Left Valve Cover Dave Schwandt Here, One of the reasons for the part # variation on A/C cars was a change in the location of the ports for the low pressure return oil line fitting from the valve and the air duct operating cylinder from the fill pipe (like on my 57 w/ac vin 2416) to the lower left side of the left valve cover on my D (vin 1662) By the way, Crazy Wayne, another D with A/C showed up at the fall meet sporting the "Schwandt Wire" in its A/C compressor harness! Greg, did we ever figure out what it's for ??