I'm sure a 650 would suffice on an non-performance 440 but you may have to step up with a few mods. A 750 would be a sure-fire fit either way.
The 2013 Chrysler 300 has a V6 engine.
The 2006 Chrysler 300 has a V6 engine.
The 2005 Chrysler 300 has a V6 engine.
The 2014 Chrysler 200 has a V6 engine.
The 2010 Chrysler 300 has a V6 engine.
The 2011 Chrysler 300 has a V6 engine.
The 2007 Chrysler 300 has a V6 engine.
The 2009 Chrysler 300 has a V6 engine.
The 2014 Chrysler 300 has a V6 engine.
The 2012 Chrysler 300 has a V6 engine.
The 2008 Chrysler 300 has a V6 engine.
The 2011 Chrysler 300 has a 3.6 L base engine size.