Radiator tips for 67 Dart with 440

I have a 430 hp 360, which I run at 207*F on purpose, with no problems.
I can tell you what is overkill, and it does NOT include a new rad, so long as water still runs thru yours.lol.
What is your definition of overheating?
Plus what does it do when it overheats?
and like @Murray asked, when and under what circumstances does it overheat?
What Idle timing are you running? with what cam-spec?
Do you have an Infra-Red heat gun?
To put it lightly the temp will continue to go up regardless of driving or idling. Just obviously gets hotter faster when driving. It'll go past 220 no problem. When it's cold out it can tend to hold steady at 205 but once I stop it'll go up and stay there which results in parking and cooling off. Timing I'm unsure, one of those things I'll be checking as I pick this apart since it's on my list next. Cam I am unsure of. Bought this the way it is and haven't needed to tear into the engine.