The only weakness with the 413 is the fact that most of the heads use 4 bolt valve covers. Not only are they more prone to leakage, but they also are harder to find pretty shiny aftermarket replacements. Other than that parts are the same for the 383, 400, 426W and 440. Parts (VALVE TRAIN) are interchangeable. Richard On Jun 4, 2013, at 2:00 PM, rinandal <rinandvan@xxxxxxx> wrote: > Hi, > Anyone out there aware of any inherent weakness and or problems with 1964 413 c.i. block/heads? > > Thanks, > Van > > [Non-text portions of this message have been removed] ------------------------------------ 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 http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button 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#querylangYahoo! 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: http://docs.yahoo.com/info/terms/