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core plugs

  1. Core/shaft plugs sizes?

    Cooling System
    I have an LN3 3800 out of a 90 Buick lesabre. I just have the engine, idk if it was real wheel or front w/d. I ordered a kit that came with 1 1/2in core plugs that felt kind of loose. The cam and balance shaft plugs were wrong too. Would anyone happen to know the sizes? I checked Napa and...