I can't really comment on the value of the 440Source housing. However there area plenty of factors that go into the cooling of the engine. Did you swap the housing for previous one and something changed? A water pump HOUSING that has no moving parts would be the last place I looked for a culprit. that being said, if you are running the temps you posted I would not be concerned. A thermostat change may help you out if you want it to be lower. I also dont know what gauges you are using to read these temps. Consider the gauge itself may possibly be off as well.
Just a few things to consider before pointing a housing.