Flathead sixes from at least 1938, exhaust only, maybe earlier. 300D 392's had hardened exhaust replaceable seats as well. Ernie and The Black Bitc_!! -----Original Message----- From: mailing-list-owner@xxxxxxxxxxxxxxxx [mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On Behalf Of aeyn Sent: Friday, November 10, 2006 12:09 PM To: mailing-list@xxxxxxxxxxxxxxxx Subject: Re: IML: Lead Additive Regarding this subject. Does any one recall when Chrysler started to put the hardened valce seats in the engines. I remember something about they started gradually putting in the hardened seats PRIOR to 1975 in differnet model lines. Æyn. --- Dan <sunup@xxxxxxxxxxxxx> wrote: > There were a number of posts recently about lead additives but > I don't > remember anything about "amounts per gallon". I followed the > directions on > the product I bought of 1/2 ounce per 5 gallons. Considering a > half ounce is > such a small amount, does this sound right? Also, can someomne > tell me what > might happen toa 440 or 413 if it is run with premium unleaded > gas and no > lead additive? If it is harmful, would it be immediate or > gradual over time? > > I'd also like to join in with thanks to those of you who fought > for our > freedom. The character and courage of men and women like you is > responsible > for the freedoms we all enjoy today. > > Thanks You! > > Dan Collins > 67 Crown Coupe > > > > ----------------- 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 ----------------- 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