IMHO you have some other issue going on. You currently have plenty of fan and radiator.
ARE YOU SURE your temperature reading is correct?
The guage is a mechanical autometer. Seems to operate fine, although it could be off. Thermostat is a 160 Mr gasket high flow. Pulleys are 6.5. This 2 row in it has maybe 5/8 to 3/4 tubes.Everything on the car is fairly new no clogs etc. And at 55-60mph I'm at 2800ish rpm so it should be flowing, as its above 160, and I pulled and tested stat.And while it could maybe be optimized to work , I want the Trans lines going through it to stabilize the Trans temp. The 4row will be here tomorrow, I'll install obviously no shroud, but same everything else and we'll see if helps
I'm not a fan of shrouds that are parallel to the radiator core ( I don't want to get into it, again) but yours is very far away from the rad so you should not have any issues.
IMHO if the factory could cool a 383 or 440 in a dart with a 22" 2 core ( might have been 3 core???) radiator than you should be able to also.
You either have a bad water pump, bad thermostat, or your pulley ratio is way out of wack.
Or you have blocked passages, clogged radiator, head gasket leak, or some other mechanical issue.
What is the diameter of your wp pulley?
What is the diameter of your crank pulley?
