Overheating issues with remanufactured 360

Is there any water in the oil?
is there any water coming out the exhaust?
have you replaced or tested the radiator cap?
does it pump the overflow full when it overheats? or even before it gets hot?

and for the love of god, never talk to that summit rep again. FYI, unless you call their dedicated tech line, you may be talking to a kid in sales, that was more than likely fired from autozone the week before. The turnover at that place is ridiculous, and if you can use their website, you more than likely have about the same amount of training that the "kids" do that start taking sales calls there. Corners are cut when you want to become the walmart of the automotive aftermarket. trust me on the above...let's just say i have based that observation on first hand experience. ;)