I'm sorry about this late reply. I created here an account to be able to post this.
My intention here is not to "dig out old post". I was in the same situation as you. I build my first HackinTosh from scratch and ran into WiFi and BT problems.
Here are my specs
GA-H270N WIFI
I3 7100 intel
250 GB SSD
Crucial 16 GB 2400 Balistix
+ bought a wifi card ( BCM94352Z Wireless-AC NGFF )
after a successful installation of Sierra 10.12.6 I could not bring WiFi to work properly.
Had to install 4 more kexts using KextBeast (put all 4 kexts files to your desktop run KextBeast and install them into /Library/Extensions
FAKEpcIID FakePCIID.kext
FakePCIID_Broadcom_WiFi.kext
BrcmFirmwareRepo.kext
BrcmPatchRAM2.kext
after that copy all of them to your EFI partition /EFI/CLOVER/KEXTS/OTHER and to /EFI/CLOVER/KEXTS/10.12
ADD the following patch to Clover in KernelAndKextPatches
Name: AirPortBrcm4360
Find: 81F952AA00007529
Replace: 81F952AA00006690
Comment: Brcm4360 Sierra fvco init
reboot and enjoy working BT and WiFi
shortly after my successful installation I noticed that I can't scan any 5 GHz signals. I spent a few hours looking for a fix and found this solution. After renaming my 5 GHz signal on my WiFi Box my HackinTosh could see and successful connect to that network. There is no need to install additional patches.
I hope this finds you all well.
PS: sorry for my English