Well, the 350 MB Print file was an earlier print-ready file. I've since created two new print-ready files based on various things.
Here is a smaller PDF (24.5x36.5", 300ppi, CMYK, 0.25" bleed all around, 105 MB)
And here is a much larger TIFF (24.5x36.5, 300ppi, CMYK, 0.25" bleed all around...