Any B/W bleach requires acid of some sort, AFAIK. If you can't get concentrated sulphuric acid just use regular battery acid from an auto supply store. About 220ml or 7.5 U.S. ounces per gallon is sufficient to make the Ilford Part B bleach.
Also, cut the permaganate in half in Part A if you are trying to reverse an old school emulsion like Efke or Adox. Full strength will literally turn the emulsion into jelly.