Mystery block OB257758 UPDATE it's a plain Jane 340

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    Author Topic: Mystery block OB257758 UPDATE it's a plain Jane 340  (Read 1073 times)

    Offline ohio cuda

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    Mystery block OB257758 UPDATE it's a plain Jane 340
    « on: May 17, 2008 - 01:32:44 PM »
    Perhaps Barry can shed some light on this engine block. This morning I was cleaning up some stuff and came across an old 340 block I had. I thought I’d get the VIN numbers off the 340 block and post it to see if anyone had a match. I’ve never checked the numbers on it and then I went Wholly Smokes that’s a T/A code. I got some brake cleaner and cleaned it again and it still looks like “OB”.

    Am I wrong that all T/A AAR engine blocks start with “OB”?  The letters look a little funny and thought the VIN numbers started a lot higher. Your can see the outline of the engine identification inset and it would indicate it’s a standard 340 and not a T/A block. I bought the block off a shaddy guy on E-BAY from MI.
    Does anyone have any ideas?
    « Last Edit: May 17, 2008 - 06:00:20 PM by ohio cuda »
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    sleepychallenger

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    Re: Mystery T/A block OB257758
    « Reply #1 on: May 17, 2008 - 03:43:54 PM »
    i thought the T/A blocks actually said TA on them? :clueless:
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    Offline bb71challenger

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    Re: Mystery T/A block OB257758
    « Reply #2 on: May 17, 2008 - 03:50:25 PM »
    The only thing that looks odd to me besides the fact that it does not have T/A cast into it is the "double" stamping of the first 2 digits on the vin rail.
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    1971 Challenger (OO==== ====OO) getting close!
    1970 Challenger (OO########OO) long ways off
    *Brett*

    Offline 72hemi

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    Re: Mystery T/A block OB257758
    « Reply #3 on: May 17, 2008 - 03:56:44 PM »
    It's not a T/A block, all T/A blocks had it stamped in front of the number  340.
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    1972 Dodge Challenger 340 6 Pack 4-speed
    1996 Dodge Viper GTS Coupe

    Offline Finoke

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    Re: Mystery T/A block OB257758
    « Reply #4 on: May 17, 2008 - 04:52:45 PM »
    I think the TA pilot vins were lower in number, like starting 245,  and the production TA vins were higher in number Like starting 275. Hopefully Barry will chime in.
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    Offline ohio cuda

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    Re: Mystery T/A block OB257758
    « Reply #5 on: May 17, 2008 - 05:28:47 PM »
    72 Hemi I agree that the other T/A blocks I have and have seen had T/A stamped before the the 340, I have several. From what I know the pilot number cars were lower VIN also. Don't get me wrong I always thought it was a standard 340 but the OB prefix I think was only used on the AAR T/A. Perhaps someone has double stamped the VIN pad hoping at some point to pass it off as a T/A which would be pretty stupid. I have faith in the old wise one Barry will come to the rescue.
    Jon
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    Alaskan_TA

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    Re: Mystery T/A block OB257758
    « Reply #6 on: May 17, 2008 - 05:43:06 PM »
    0 is the last digit of the model year - 1970

    B is the assembly plant for the car - Hamtramck, MI.

    From /6 to Hemi, all engines from that plant that model year would be stamped "0B".

    This engine is from a 340 Cuda, so possible VINs for the car it came out of would be either BS23H0B257758 or BS27H0B257758 (hard top or converible)

    Lots of original VIN stamps show a "double" strike very likely from the tool rebounding.
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    Offline ohio cuda

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    Re: Mystery T/A block OB257758
    « Reply #7 on: May 17, 2008 - 05:57:44 PM »
    Thanks Barry-mystery solved again.
    Jon
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