Cant cool my 5.9 magnum. Radiator size or add one thing else?

maca said
Your right. That's why i am on here trying to find the problem. It doesn't take much to push my heat up so its always just on the edge of being able to cool it. I would love to find the problem

I posted my combo, that runs rock-solid. I guess I should gut my stat, and take her for a blast and see what she can do. Oh wait I already did that. IIRC it was 160ish.
T recap;
I can tell you what works for me.
I run a 26" factory A/C rad from a 73Dart,matching shroud,and 7psi cap.
sealed to the hood and core support
I currently run 50% antifreeze, but it cooled slightly better with 100% water
A hi-flow Milodon W/P which is an 8-vane pump with an anti-cavitation plate.
A hi-flow thermostat that maintains a minimum 205*F
Anti-collapse spring in the lower hose.
Restricted bypass hose, and, in summer,blocked heater-hose circuit.
7-qt oilpan with 6 qts or less in it.
Fresh cold air to the carb
14* idle-timing,32* power timing, a 2-stage timing curve, that delivers 28* at 2800rpm, and 32 by 3400.I run a Vcan of 22*, that is all-in very early.
The carb is a little fat on the low-speed circuit.It runs 10.9Scr and 87E10.
A 7-blade A/C clutch-fan with a Thermostatic clutch from a Ford pick-up
I have a slight underdrive on the pulleys, cuz I rev this old girl to 7000 on a regular basis.
My engine likes lots and lots of cruise-timing; over 52*@ 2200.
I installed an overdrive, to bring my cruise revs down 600rpm.

If I was having your problem, I would install the parts in blue above or a reasonable facsimile.I would disable the Supercharger, remove the intercooler,install that gutted Stat, and tour it for several days like that.It would be nice to know if the Intercooler itself is restricting airflow to the rad. If I found that the temp now runs 20 to 30 degrees cooler, then I would reinstall the inter cooler and run it like that for a day or two. And so on.
I'm sure you know, that the super won't add much heat when off boost, but when on boost,the intercooler will be slamming hot air into the front of that rad;it has nowhere else to go.
I'm guessing you also know that the rad woks better, the greater the temperature change across it. If there is 130 degree coming in from the front, and 200 degree air under the hood and behind the rad, it's not gonna cool very good. If you have pusher fans in front of the rad, you are trying to push atmospheric air at 1 atmosphere through the rad into a pocket of air that is very hot and quite possibly at higher than 1 atmosphere. You are asking the pusher fan not only to push air through the rad but to also push that hot air out from under the hood.It was never designed for that.
You may have to be imaginative in finding ways to reduce the underhood temps or to evacuate the hot air.I have heard of guys installing devices under their cars to do just that at speed. Obviously a little spoiler won't accomplish anything when the vehicle is stopped, or idling in traffic. This is where the mechanical fan running off your crank really shines;you just bring up the revs a couple of hundred rpm and that baby pushes air, jus-saying.