Radiator question

Well now my situation is almost like this except we were breaking the engine in yesterday and she got to 150 then spiked to over 200. We shut her down. The distributor would not advance more than 15 degrees so I had an extra distributor laying around threw that in we were able to go to 30 degrees advanced she held steady watched the thermostat open then spiked again. Shut it down. The thermostat is new its a 180. The last thermostat I had in there was a 195 I tested it and it worked fine, but decided to replace it anyways. This is the second time I have run into overheating issues during the break in. I checked the water pump while it was still on the engine I hear the blades turning. My question is.....should I have the radiator flushed by a professional? I am thinking either there is air in the cooling system or....there is a block in the radiator core. Please let me know what you guys think. Thanks.