'72 Dart w/360 cooling issues

every lb pressure in the system is good for ~+3 degrees added boil temp.

60% antifreeze raises boiling point of water to 230 at sea level itself. Most radiators are pressurized to at least 8psi which raises the boiling point to 236 itself. Boil over is bad, running a motor 'hot' (by design) is not bad in itself, less cylinder wear,less emissions. Just keep your ambiant air temp (intake temp) cool. My 82 truck has a stock 192 stat!

Run a full shroud, free cooling efficiency even at speed.