The 413, 440, 426 " RB " (Raised Block) engines have an engine ID pad that is flat and horizontal. It's on the right side as you are looking at the front of the engine, in front of the intake manifold and at the rear of the water pump. If you don't see a flat, horizontal pad there you probably have a 361, 383 or 400 " B " engine. The 361, 383 and 400 " B " engines do Not have that flat, horizontal ID pad. On those engines the ID is on the Left side as you look at the front of the engine, on the front of the block, below the cylinder head. Also, when you look at a 361, 383, 400 block ...on the right side as you look at the front of the engine, there is NO flat Horizontal pad. There is a flat pad that is in front of the head BUT it is at an angle, following the slope of the head. Hope this helped and not confused you. Happy 300'ing Lion Charlie Valentine ----- Original Message ----- From: JettLarry@xxxxxxx To: chrysler300@xxxxxxxxxxxxxxx Sent: Tuesday, October 26, 2010 2:35 PM Subject: [Chrysler300] 1963 300 J wannabe Just bought a rust free CA blackplate barn find. It has every option including leather. Seller tells me it is a 413. The AC compressor hides the engine serial number. Is there any visible proof of the cid of these RB engines other than the engine number? This car is a survivor and just makes me shiver with excitement should if really be a 413. The pragmatist in me suggests it can't be but a 383, but maybe? It will be at LSMFT....will you? [Non-text portions of this message have been removed] [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/