Owen: With respect to my '55 C-300 (and all 55-58 300's), the book is non-specific. Our car has core 1541641 which the book shows as proper for '55-'56 DeSoto Firedomes and Chrysler Windsors w/a/c; and '55-'56 Fireflites, NY's, Imperial's and Crown Imperial's w/o a/c. The book does show a presumably larger radiator core 1599992 for '55-'56 Fireflites, NY's, Imperial's and Crown Imperial's w/a/c. I have noted that a/c cars of this era have a fully boxed shroud on the back of their cores. After all this and on a whim, I Googled "1686501 radiator" and was led to our club website (imagine that!) that shows all proper radiators for '55-'65 300's. The 1686501 is for a stick shift '57 300. See: http://www.chrysler300club.com/rcmstuff/hints/helpfulhints.htm It confirms I have the correct radiator in my '55 and that the 1599992 core was installed on '55 and '56 a/c 300's--just like a NY or Imp. The summary shows some cores for '57 and '58 300's that do not show up in the parts book. Once again the website had the answer. C-300'ly, Rich Barber 1955 Chrysler C-300 -----Original Message----- From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Owen Grigg Sent: Tuesday, May 12, 2009 3:09 PM To: L-FORWARDLOOK@xxxxxxxxxxxxx; Chrysler300@xxxxxxxxxxxxxxx Subject: [Chrysler300] Radiator part number help Hi all, Can anyone help with radiator # 1686 501 as to what model or models it is listed for. I can not find it in my passenger car listing, maybe it is light commercial? I can tell you it does bolt right up to a '57 Chrysler passenger car though. Thanks for any help. Regards Owen ------------------------------------ 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/