I got my Savoy to stay under 210 most of the time with a 26" radiator, flow cooler HV pump, 440 Source repo pulleys that are 1-1, and a 190 stat. Still no shroud and it runs cool all day yesterday at 89 degrees for a 1 hour cruise. I just replaced 1 thing at a time until it ran cool.
I found that the rust in my block kept filling my radiator with scale. I installed a coolant filter in my upper hose and I have emptied it 4 times already. It is clear so I can also monitor the flow rate of my coolant. The Flow-Kooler pump really moves some coolant at idle . I understand the fear of anything over 200 but it really isn't dangerous,230-230 yeah you can start to worry about that if it doesn't cool down

Gus