Hi Rich, Somewhere numerous years ago I read that the conversion to 355hp for the 300B also included 4-bolt flanged exhaust manifolds (I believe truck parts) and the entire exhaust system of larger tubing. There was also a comment that the heads were different. I cannot vouch for the authenticity of this information as I've forgotten the source and it's also possible that my recollection has become a bit distorted. ---------------Marshall Goodknight Please note: message attached From: "'Rich Barber' c300@xxxxxxx [Chrysler300]" <Chrysler300-noreply@xxxxxxxxxxxxxxx> To: "'Chrysler 300 Club, Int'l'" <chrysler300@xxxxxxxxxxxxxxx> Cc: "'300-John Lazenby'" <french_fryguy@xxxxxxxxx> Subject: [Chrysler300] 355 HP B's Date: Sat, 29 Aug 2020 11:10:29 -0700 ____________________________________________________________ Sponsored by https://www.newser.com/?utm_source=part&utm_medium=uol&utm_campaign=rss_taglines_more LaPierre's Ex-No. 2 Rips NRA http://thirdpartyoffers.juno.com/TGL3131/5f5176125fc1976120786st04duc1 Market Just Had Its Worst Day in Weeks http://thirdpartyoffers.juno.com/TGL3131/5f51761280e3b76120786st04duc2 'Green Drone' Drops Hundreds of Bags of Pot on City http://thirdpartyoffers.juno.com/TGL3131/5f517612a4b2d76120786st04duc3 [Non-text portions of this message have been removed] ------------------------------------ Posted by: "mgoodknight@xxxxxxxx" <mgoodknight@xxxxxxxx> ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to https://groups.yahoo.com/neo/groups/all/manage/edit For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylang ------------------------------------ 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: Chrysler300-digest@xxxxxxxxxxxxxxx Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo Groups is subject to: https://info.yahoo.com/legal/us/yahoo/utos/terms/