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Help with mystery motor...

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Old Sep 9, 2003 | 11:23 PM
  #1  
JayB's Avatar
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Joined: Jul 2002
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From: WC, Ohio
Help with mystery motor...

I have the opportunity to purchase a motor...it came out of a 1 ton chevy truck. Its rough shape, it supposedl has 98k on it, but it may make a really good rebuilder motor for my first project, the only numbers i was able to get from the seller are


T0611ctu


He believes that the 11 could be a seperator for t06 and ctu

Any help????

Could be a 400 or 350???
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Old Sep 10, 2003 | 07:09 AM
  #2  
Ricktpi's Avatar
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Joined: Mar 2002
Posts: 1,654
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From: Lower Salford, PA
Car: 1987 Camaro Z-28
Engine: 6.3L Victor EFI
Transmission: Tremec TKO 600
Axle/Gears: Moser 9"/4.11 Trac-Lok
CTU, if correct, is not a truck engine. Truck engine codes start with "T". GM never put 400 SB's in 1 ton trucks. CTU is a valid code for a 1976 Caprice 400 SB engine.
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Old Sep 10, 2003 | 07:47 AM
  #3  
RB83L69's Avatar
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Joined: Jul 1999
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From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
If it is a 400, the harmonic balancer will have a big chunk missing out of it.
Attached Thumbnails Help with mystery motor...-400-balancer-closeup.jpg  
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Old Sep 10, 2003 | 10:45 PM
  #4  
Air_Adam's Avatar
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Joined: Oct 2002
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From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
Look for 3 freeze plugs. Thats what gives away a 350 from a 400. the 350 only has 2.
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Old Sep 11, 2003 | 05:35 AM
  #5  
RB83L69's Avatar
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Joined: Jul 1999
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From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
Only the early 400 blocks have 3 freeze plugs.

A side view of the 509 casting 400 block above:
Attached Thumbnails Help with mystery motor...-400-block-side-view.jpg  
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