Welcome to JA.
If you bled the master before installing it, Yes i would replace the equalizer block , Often the block becomes trapped with contaminant's and will throw the balance off and even bleed threw on side to the other,
Let me know if i can help more!
I Would replace the block For installing just make shire the fluid is clean and there is no dirt or rust when installing it.
The valve is pre set Just gravity bleed the brakes starting with the RR, then LR then RF then LF Run fluid threw until looks clean
You should be ready to go then!
Hello Yes please let me know if i can help more!