D^2, 4966S is a C4-AVS carb used on all '71 440 engines; not just Imperial. In my experience, all AVS's were square-bore. The Thermoquads came in '72 with spreadbore. Hope that helps. Mark Evans 1963 Imperial Crown Convertible http://www.imperialclub.org/~maevans/MyImperial/index.html 1968 Dodge Polara 500 Convertible http://www.imperialclub.org/~maevans/MyPolara/index.html ----- Original Message ----- From: <dardal@xxxxxxxxxxxxxxx> To: <mailing-list@xxxxxxxxxxxxxxxx> Sent: Saturday, September 04, 2004 5:43 PM Subject: IML: AVS part number? > Does anybody know if the AVS 4966S is the spreadbore or the squarebore version? > Is this what the 70-71 Imperials had, or is it the high performance version with > the large size primaries? > > Thanks > > D^2 > > > > > ----------------- http://www.imperialclub.com ----------------- > This message was sent to you by the Imperial Mailing List. Please > reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be > shared with everyone. Private messages (and attachments) for the > Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx > To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm > ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm