I think so, but Q3 is current driven, not voltage driven. Trying to use resistors to set its current introduces heat inflicted DC drift. If I am interpreting you correctly, you would obstruct the DC feedback. Your centered output point is connected back to a centered differential pair. The centering of the output stage is done by adjusting R1 and R2. Schematic post #29 needs a capacitor between R7 and ground to force the DC levels to be correct while allowing you to dial in any gain you want.