Derp, someone messaged me about having problems with the setup I posted above and I noticed that my picture of the 72 engines only had 64. However, after adding in the 8 missing engines it's still working fine. That said, I should note that, for those that can't see it, I do have the two lines of liquiducts connected to two separate faces, so each face is feeding 36 engines, give or take the few connected by being next to one of the lines.