robot builders bonanza parallel port interface question

I am having problems understanding how the selectable parallel port circuit on page 477 of the book (2nd edition) should be wired up, particularly how the 8 data bits (pins 1 to 9) from the port are all supposed to be connected to each 74367 ic and how many output bits there are from each 74367. Has anyone built and used one of these circuits ? Thanks Steve

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