I tried your instructions from your archive and was able to boot successfully and the card seemed to work OK.
However the system became very unstable. I was unable to update to 10.14.2 and also started getting random reboots.
I had to reverse the patch (even though I am no longer able to re-enable SIP protection), then I could update to 10.14.2 successfully and no more random reboots.
I think this card is a little too unstable on my laptop.
Unfortunately I bought a BCM94352Z but it's the model with one notch only so it does not fit my slot
. I'll see if I can self drill the second notch, which looks very tricky. This WiFi replacement is turning up to be a nightmare.