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| | | | Joined: Mar 2009 Posts: 93 Shop Shark | | Shop Shark Joined: Mar 2009 Posts: 93 | I have a 1947 2-ton chevy truck. Great running old truck but the engine I know is not original and I can't find out what year it is or for that matter what exactly it is. The Serial number is F112L (Maybe FII2L) and the casting number is CON 4 A78. I've looked through several numbers references and I still can't find it. Does anyone know what it is? | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | Here are some guesses at the codes: F112L F = Flint, MI manufacturing plant 1 = January 12 = 12th day L = installed in a 6000 series truck CON4 A78 A = January 7 = 7th day 8 = 1958 There might be different interpretation s of the above codes - people will post corrections, etc. We will be able to tell you more, if you post a few more codes from the head and block. | | | | | Joined: Mar 2009 Posts: 93 Shop Shark | | Shop Shark Joined: Mar 2009 Posts: 93 | I've heard of that coding, but how can I be sure it's a 1958 and not a 1968 or a 1978? | | | | | Joined: Mar 2004 Posts: 6,214 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,214 | 1947farmer, There will be a long casting number on the side of the block. This number would be used for only a few years, so by knowing the casting number and date code you can ID the engine block. I don't believe any casting number ever lasted 10 years, they are always changing things which then makes them change the casting number. Hope this helps! Mike B  | | | | | Joined: Jan 2000 Posts: 2,074 'Bolter | | 'Bolter Joined: Jan 2000 Posts: 2,074 | Also, you motor could be a 48 if the side cover goes around the spark plugs and could be an early 235. The most important number is the casting number, should be below or near the fuel pump, usually hidden behind muck and oil. Also get the number off the head, will be another clue to what this motor is.
Good luck | | | | | Joined: Mar 2009 Posts: 93 Shop Shark | | Shop Shark Joined: Mar 2009 Posts: 93 | Thanks for the guidance guys. I got her figured out.
I miss read the one number (Should have been CON 4 A79 and after finding the casting number I was able to identify it.
It's a 1959 261ci!! The big one!
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