I am getting to the point of installing my rebuilt 230 in the "52 Suburban chassis. I few years back, I picked up a 3 row, Champion aluminum radiator, that supposedly fit a '52 Plymouth. It does fit, but it got me thinking about using a modern radiator with a 13lb cap, on my '56 Plymouth motor. Although it's been completely rebuilt- hot-tanked, cooling passages cleaned out and new water distribution tube, how much coolant pressure is ideal? I've heard various opinions from 13psi down to 4 psi. (Some folks even say unpressurized). I don't want to be popping out freeze plugs in the desert!
As you can see, I have a few stock radiators to choose from, should I want to return it to stock.