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If you do a search on ebay for the original GM part number # 25518526 you will find the correct gaskets being Felpro and others along with some GM NOS gaskets
I've used both, Victor and felpro. Victors seemed more robust, if that makes sense and less prone to crush.
Victor brand is sometimes hard to find though. Frankly, I don't think amounts to a hill of beans which you uses. Just torque the acorn nuts to spec and no more.