Hi Vince, I recall that in September 2002 you installed your original rebuilt 300C engine and had some problems getting the 300C to get the idle low enough without stalling. I assume you corrected the idle problem. Metering rods are three step are for 1957 300C. I have listed the diameter of the rods, as Economy, Mid and Wide open. 1 lean - #75-1180, .077, .068, .052 58 Standard #75-1160, .076, .066, .048 Original - 57 #75-1263, .075, .065, .042 2 lean #75-1181, .078, .070, .055 My carbs were modified in 1957 by the original owner. I use the 1 lean rods. Technical Bulletin #364 tells us to use "Carter Meter Rod # 75-1160" which I think to "too rich" for normal driving. Hope you locate the metering rods you want. We have owned our 300C for over 50 years. John & Arlys Chesnutt, Portland, OR. -----Original Message----- From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Vince Helbling Sent: Monday, December 15, 2008 7:58 AM To: Chrysler300@xxxxxxxxxxxxxxx Subject: [Chrysler300] 300 c carburetor modifications I would like to try the modifications described in the Chrysler TECHNICAL BULLETIN #364 (or 384) dated 7/18/57. The change involves installing (4) metering rods #75-1160. Does anyone know a source? Or can anyone tell me the diameter of the rod at high speed (small diameter) and low speed (large diameter). Is there a cross reference chart available that shows Chrysler numbers vs carter numbers on the metering rods. Does anyone have any info how this change worked in their car, especially regarding idle? I think I read somewhere that this change was incorporated into carburetors for 1958. Anyone have any advice? I have the motor on a running stand in the garage and will happily post results if I can get enough parts and info to try it. If the change is already in the 58 carbs, I could trade my spare 57 carbs. Vince in tampa bay [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/