It seems there was an issue of casting numbers vs. part numbers. The part numbers may be different from the casting numbers and the part numbers may not even appear on the casting. I'm sure our experts can help sort that out and ask that definitive answers be posted publicly on this server. I can send you pix of the topside of my installed '55 manifold if that would be of any help. They are with everything except the air cleaner in place, so are pretty cluttered. My take on the parts book is that the part number is the same for both 1955 and 1956 intake manifolds (with or without a/c on the '56): 1731686 C-300'ly Rich Barber Brentwood, CA 1955 C-300 -----Original Message----- From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of cotejohnr@xxxxxxx Sent: Sunday, July 09, 2006 4:13 PM To: chrysler300@xxxxxxxxxxxxxxx Subject: [Chrysler300] Dual Quad manifold Hi All, Could anyone verify that an inline dual quad manifold with the part number 1634285 on its underside is for a C300 or 300B? I could not find this number anywhere including the Mopar '55-'58 original parts book. Also, please indicate what source you used. Thanks alot, John Cote Guilford, CT. ________________________________________________________________________ ------------------------ Yahoo! Groups Sponsor --------------------~--> Check out the new improvements in Yahoo! Groups email. http://us.click.yahoo.com/6pRQfA/fOaOAA/yQLSAA/8LmulB/TM --------------------------------------------------------------------~-> 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/ <*> 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/