Radiator Size ????

I said all that. It’s that simple.

Let me lay it out again.

Biggest TWO CORE radiator that will fit. You can say more cores are better all you want, but not ONE performance radiator builder will tell you more smaller cores are better at cooling. Griffin told me they will build a three core because that’s what some guys want, but they won’t do it if they don’t have to.

Overdrive the pump. ALWAYS. That also gets the fan speed up.

High flow water pump.

High flow thermostat.

Correct tune up.

You do that and you’ll never have heating issues unless someone goes full on retard with something.

And just to end this bullshit argument, I’ll post these links from THE cooling EXPERTS. Everyone should read the links and think for themselves.

Tech Tip #1: Water Pumps & Pulleys - Stewart Components

Tech Tip #3: Thermostats & Restrictors - Stewart Components

Tech Tip #3: Thermostats & Restrictors - Stewart Components

Tech Tip #5: Radiators & External Plumbing - Stewart Components

Advanced Cooling System Basics - Stewart Components

There are more tech pages there but these should be enough that more cores, multiple pass radiators and junk like that aren’t what should be used.
Yet here is a quote from Natrad, who have been building radiators for over 100 years and were suppliers of original equipment to , Holden, Ford and Kenworth.

" 1-2 row is ideal for stock standard vehicles and exact replacement requirements.
3-4 rows are best for high horsepower, performance or off-roading vehicles as well as trucks."

https://natrad.com.au/info-advice/picking-your-radiator-core-2-row-3-row-or-4-row/
Trucks, hmmmm...
Kenworth Truck Radiator

Fits: T600, T700, T800

W900 - with CAT C15 500HP Engine
Years: 1988 to 2007
4 Row, High Efficiency Core w/ Bolted-on Tanks
Includes Surge Tank; Inlet Connection is Curved

From personal experiences, I've never had heating issues using more than 2 cores in a radiator. In fact, I've sometimes found benefits going to more cores.
Guess I'm just lucky.
One thing is for sure, maximize the surface area of the radiator.