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| | | | Joined: Mar 2011 Posts: 85 'Bolter | | 'Bolter Joined: Mar 2011 Posts: 85 | Hi, A friend gave me this motor said it was a 400. Code on the pad is TO325CTD I could not find any info on it any help would be great. Thanks Steve | | | | | Joined: Feb 2016 Posts: 1,982 'Bolter | | 'Bolter Joined: Feb 2016 Posts: 1,982 | You should also find a casting number on the block, rear left just above where the bell housing mounts, how many freeze plugs are in the side of the block?
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
| | | | | Joined: Mar 2011 Posts: 85 'Bolter | | 'Bolter Joined: Mar 2011 Posts: 85 | I will look tomorrow when I get to the shop Thank you | | | | | Joined: Jul 2000 Posts: 2,188 Insomniac | | Insomniac Joined: Jul 2000 Posts: 2,188 | Decode it here: https://nastyz28.com/chevy-engine-code-stampings.phpYou have a 400 originally installed in a Caprice with automatic transmission and 4 bbl carb. 175 HP. Built March 25 in the Tonawanda plant.
Gord 🇨🇦
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1954 1/2 ton 235 4 speed
| | | | | Joined: Feb 2004 Posts: 29,755 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,755 | A 400 will have a very large harmonic balancer, with a weight cast into one area- - - -those engines need to be externally balanced. Ditto for a flywheel or an automatic trans flex plate- - - -there's a balance weight on it if it's on a 400. The "T" prefix on the engine number generally means it's s truck engine- - - -probably with 4 bolt bearing caps on the number 2,3, and 4 main bearing webs.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Mar 2011 Posts: 85 'Bolter | | 'Bolter Joined: Mar 2011 Posts: 85 | Thank you for the info I will pull the pan and check what Hotrod said and get more numbers from the block. Thanks again Steve | | | | | Joined: Dec 2008 Posts: 899 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 899 | CTD could either a 1974 400 or a 1978 305. Scroll down the chart till you see CTD. http://www.1968ss.com/sbcsuffix.aspAlso run your hand down the side of the block. 305 will be flat. A 400 will have slightly protruding lumps because of the larger bores. 400 will have a notch cut out of the harmonic balancer, because it's externally balanced.
Brian
1955.2 3100 Truck
The older I get the more dangerous I am!!!!! | | | | | Joined: Dec 2008 Posts: 899 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 899 | Hey Steve, did you ever figure what you had?
Brian
1955.2 3100 Truck
The older I get the more dangerous I am!!!!! | | | | | Joined: Mar 2011 Posts: 85 'Bolter | | 'Bolter Joined: Mar 2011 Posts: 85 | Been away for a while yes I did thank you. | | |
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