Christopher - What you are describing is what they used for the body mount under the trunk floors of convertibles. I'll bet that you also have an X-piece on your frame. It's all about extra strength and rigidity. On my 59 Dodge convertible, I discovered these welded to what was left of the trunk floor. When I welded in the new floor, I made sure that these were included. BTW, I believe mine had bolts running thru them, anchoring the trunk floor to the body mounts. Ron ----- Original Message ----- From: "christopher beilby" <thelastbestgenius@xxxxxxxxxxx> To: <chrysler300@xxxxxxxxxxxxxxx> Sent: Tuesday, December 09, 2008 2:35 AM Subject: [Chrysler300] 300C body mount production change? > > While I still have the body off the frame of my Dec 28 1956 300C supercharged coupe, I have noticed that the 2nd most rearwards body mount, the one that sits each side behind the rear axle, and just sits on a rubber round block held on the frame, has no bolt though it, has on this car a seperate round multi pressed plate that is directly under it, and affixed uner the floor. > > However on my two later 300Cs, around March 1957, this round sperate pressing/plate, of about 6-8 inch rough diameter, is not there, and the steelwork there is as one piece instead shaped as a raised sort of boxlike mound/bracket base. > > Anyone know when/if this body production change occurred, and why? - my guess is the seperate plate would be a real rust haven/germinator, and would soon rust out the floor sheetmetal it attached to?? > > Frame leaves the Welder's tomorrow - the welded on idler arm bracket has taken a bit hit some time, or broken factory welds and been roughly rewelded, which we are fixing - anyone else had such trouble with their 300C ? Otherwise every factory weld still as good as new, although welder guys cannot believe how rough/crude they look. > > Christopher Australia, burning some dollar a litre gas in my driver 300C today > _________________________________________________________________ > Messenger's gift to you! Download free emoticons today! > http://livelife.ninemsn.com.au/article.aspx?id=669758 > > [Non-text portions of this message have been removed] > > > ------------------------------------ > > To send a message to this group, send an email to: > Chrysler300@xxxxxxxxxxxxxxx > > For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm > > For archives go to http://www.forwardlook.net/300-archive/Yahoo! Groups Links > > > ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: mailto:Chrysler300-digest@xxxxxxxxxxxxxxx mailto:Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/