Running Hot?

Your problem is that you capped off the heater hose pipe on the water pump instead of connecting it directly to the intake, you are stopping flow which will aid you in cooling. Connect the the water pump pipe to the intake manifold pipe with a 5/8 hose U shape and see how it runs, either thats your problem or your running leaning/timing issue, your cooling system is looks good. check your thermo run 180degrees