Does it matter which side of radiator the transmission lines hook up to?

Ima thinkin' if you run a 195 stat,then the top of the rad will be at that temp. By the time the coolant gets to the bottom it should be running about 30 degrees cooler so 165. Now the cooler in the rad is just a little single pass tank. So it too will be at 165ish. The oil coming from the trans better not be too much over 230.In a streeter,most of the time it will be a lot less, so an aux cooler is rarely required. Fortunately the trans is not as sensitive to oil temp as the engine is , but Kansas winters can be pretty cold,so, if you need to run a cooler, at least get one with a temperature regulated bypass, and I would then run it before the engine rad, so the rad can actually warm the oil up in the winter.
I have run 904s without a cooler at all, with no ill effects, both summer and winter, behind a lo-perf 318. That aluminum box has a lot of radiating surface.