You replaced the 2N3264s and they burnt up? Any time you replace outputs, I always replace the drivers too. Also check ANY associated resistors for opens.
My concern is not Vb at first, I need to check the transistors themselves.
You have about 1.6v base to base on the drivers. Possibly a little low, but all that means is a trifle more crossover distortion than we might like. That runs cooler rather than hotter.