Radiator upgrade

I have the stock slant six radiator in my 68 four door dart right now, thinking of an upgrade. I live in Hawaii, and radiant temps in the tropical sun can be brutal. I am also going to put in AC as well. We actually have bad traffic sometimes. So I am a little worried about cooling. So I am swapping in the 225 for the 170, which has a mild Oregon cam, 2bl manifold, Weber 38 square bore, milled .080 head for a tad more compression. So litely breathed on. I was thinking of slipping in a SB radiator while I am at it, and a bigger trans cooler at the same time. Doesn't the stock SB radiator bolt into the place of the Slant six radiator?