Differences in 870 Blocks?

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  • Joe L.
    Beyond Control Poster
    • February 1, 1988
    • 43129

    #16
    Re: Differences in 870 Blocks?

    Originally posted by Greg Young (48623)
    Joe, this is a complete aside, but another interesting thing about my 72 with the 0014 block is the fact that it has a 3.70 rear gear mated to the "standard" M-20 ZW4 transmission. It is an LT1 and from what I understand from the ordering and Power Team guides of the time, if you ordered an M-20 the standard gear was a 3.55, a 3.70 gear was optional. I have the build sheet, the dealer order sheet, the POP and the window sticker. Both the build sheet and the POP show that the car came with the 3.70 rear gear and the M-20 transmission, however the window sticker and the dealer order sheet do not call out the 3.70 rear gear, in-fact the dealer ordering sheet calls out the standard ZW4 transmission and the 3.55 rear gear. I saw another 72 convertible LT1 like mine that Pro Team sold a while back and it was the same situation, what do you make of this? Thanks, Greg
    Greg------


    I don't think the rear gear situation has any relationship to the block irregularity. I would say that there was simply a factory-mistake involved here. Such mistakes do happen.
    In Appreciation of John Hinckley

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    • Greg Y.
      Expired
      • February 26, 2008
      • 38

      #17
      Re: Differences in 870 Blocks?

      Hi Joe, Thanks for the information, I was not thinking that the anomaly on the engine/transmission was at all linked to the block, just wanted to get your thoughts. The block in the car is numbers matching, so I know it is the original block to the car. How rare is this block in the 72's, I have read about them being in a few and even in this post, an LT1 is mentioned to have the 0014 block. It sounds like a Tonawanda block that was machined in Flint is not the norm? Thanks again, Greg

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