The 413s and up have a pad on the front of the block that is on the driver side of the distrubtor. The pad usually has the engine size stamped on it. It is about 2 x 2 . 400 and down do not have this pad. ----------------- 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