In the ?INC? club database, I note several E?s with four and five digit serial numbers following the MR413?none relating to the VIN and they don?t look like dates. Owners have reported prefixes of MR, MB & MP before the 413. I suspect they are misreads and/or typos and that all the prefixes are MR. Perhaps the Chrysler build tickets include the original complete engine number? I just spent way too much time on the ?net? searching for answers to this question and the most definitive answer would be to reference the block casting number to determine which of many variants one may have. >From the Imperial website: Engine numbers back in the early 1960's were not that long. For 1961, the engine number on an Imperial would have had prefix "R 41" or "R 413", followed by digits for the date of assembly. A third digit, "2", after the date meant the car was built on the 2nd shift that date. The car's serial number was not stamped on the block and there is no way to prove the engine in the car was the engine the car was built with originally. In '61 the Engine ID was not by the distributor. Looking at the car from the front the engine ID number is located on a flat pad directly in front of the valley pan/intake closer to the driver side head. Should start off something like XX 413. There is a pad on the front of the block on top just in front of the intake manifold. This is referred to as an RB pad, because it is only there on the RB blocks and not the B blocks. This is where you will find info on the engine such as year, size( RB's were 413, 426w, and 440) and other things such as undersized bearings and oversized cylinders. >From another Imperial website: Engine number, except limo (on the block in a flat space behind the water pump): MR 413 1001 à MR 413 ..... Limo: see 57 Serial and engine numbers are not the same. Rich Barber Brentwood, CA From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of gary_r_23 Sent: Sunday, August 26, 2012 1:45 PM To: Chrysler300@xxxxxxxxxxxxxxx Subject: [Chrysler300] 59E Engine Number Hello all, Does the 413 engine of the 59E have any special numbers stamped onto it? Today I saw a 59 413 engine with some stamped numbers I did not expect. There was the usual "M 41" identifying it as a 1959 413, but below that was stamped "30076". It was my understanding that the 413's did not have individual engine numbers stamped onto them. Or are 300's the exception? This engine is in a 59 Imperial but this unique stamping makes me wonder if the engine came from a 300? Thanks, Gary Runkel Canton, MI [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/