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Motor numbers


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I have a '69 Skylark with (I think) is a '72 GS Motor. I found some numbers on the back of the Block ( 1931447 ) or it could be (1231441) does this tell me the type of motor if so what is it?

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On the top, back of the motor, where the distributer would go in on a chivvy, there will be a large 455 (under all the gook that has piled up there over the years) if its a 455. <P>------------------<BR>George C. Thomas<BR>70 GS 455 12.teens<BR>86 GN Low 13's/ high 12's

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