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Posts posted by Dave39MD

  1. Larry,


    ACDelco was around long before Delphi. It started as United Motors Service Corp in 1916 and in the 1960's became United Delco. AC wanted to go their own way and did for a period of time then in 1974 AC and Delco merged their sales forces and warehousing. They celebrated their 100 year anniversary last year. 


    I guess we are getting away from the op's question.



  2. Thanks for the reply. I suppose my question or point of concern is that there is no visible lamination on the edge of the  glass but when you use the nickel test I see two reflections.


    I suppose it could be carefully finished old safety glass with some type of edge treatment that hides the laminations?


    Anybody have any ideas, is the nickel test definitive?






    Like midman I have a 1931 Buick. The glass passes the nickel test as being safety but also like midman there is no lamination line like on the safety plate in my 39.


    Does anyone have an idea on why there is no lamination line ? I just want to be sure it is safety glass as there are no markings on the glass.


    The car has never been restored but that doesn't mean the glass wasn't swapped out.






    The Buick glass measures about 1/16 less in thickness than the 39 Chevy safety plate, about .210.



  4. No, that is not what we have been saying. The currently available AC spark plug is R45 and is available at Bob's and many of your local parts sources. R46 will have to be sourced from members as offered above or ebay type sources.


    R46 is a good plug, just not as easy to acquire as R45.  



  5. I am not sure about the cross, my AC book shows RJ12C crossing to C49. C49 would be beyond the heat range recommended by the manufacturer. What exactly on the plug is 3X times longer?


    Hot plugs, like a 49, have been know to melt holes in pistons.


    I have more books and will check further but I would use what the manufacturer recommended.



  6. Measuring from the base where the gasket sits on the plug to the tip;

    Green Stripe made by AC

    R46 - 2.236

    44 (should be the same as 46) - 2.236

    Currently available ACDelco

    R45 - 2.496

    Vintage of the car AC

    46 - 2.202


    You can get the current ACDelco at most any parts outlet. The green stripe plugs seem common on ebay, the stripes are around the insulator.


    Hope this helps



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  7. The Cardone fuel pumps appear to be using the AC numbering system. Just drop the number before the dash and you have the AC number. One that stuck out was 40987 which was a very popular Chevy v 8 pump. If you don't have an AC catalog make a list post or pm me the list I can try and give general applications as time permits. Delco rebuilt carbs were discontinued in the early eighties , I will look to see if I saved a catalog.



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