I was going to say this, the one on the left has the LB7 regulator and the right one has the LBZ regulator. I am not sure you want to run the two different style regulators together, it might cause issues with one pump putting out more pressure then the other two or less pressure.Only physical external difference in the 2 pumps are the regulators
Um, the LBZ/LMM/6.7 pumps are physically different than the LB7/LLY/5.9 pumps... Shapes are slightly different, LBZ is the center one, outter is LB7/LLY
I was going to say this, the one on the left has the LB7 regulator and the right one has the LBZ regulator. I am not sure you want to run the two different style regulators together, it might cause issues with one pump putting out more pressure then the other two or less pressure.