360 running hot…very hot

i have a 360LA in my 68 dart. The radiator is a new aluminum 19 inch core width, the fan is a 16 inch non clutch, and it’s shrouded. the thermostat is a 185 high flow. At idle the car can climb as High as 230 pr more…I know this is dangerous territory. at cruise it drops tom185 to 190. my plan is switch to electric but am I missing anything obvious ? I did blow through the heater core and radiator and flow doesn’t seem to be an issue.

the only thing I’m unsure of is that the POnput a trans cooler on the front of the radiator which covers about 20% of it. A paper in front while running gets sucked right to the radiator
Have you verified it? Get an IF temp gun and shoot the thermostat housing. Shoot the upper hose going into the radiator. Shoot the lower hose coming out of the radiator. Make SURE those temps are correct. How much of the fan is in the shroud? Should be about half way. WHAT BRAND radiator? New isn't always GOOD. Don't forget that. Make the checks above and report back.