I was watching a video that was created by Tim England regarding his 4.3 V6  install in a velocity.

In his install he was running some sort of oil cooler that was a combination oil filter mount with a heat exchanger working off of the coolant from the radiator (or something to that effect.) His argument for this approach centered around his belief that under extremely cold temps at altitude, an oil cooler that is inside the radiator may make the oil too cold to run at peak efficiency. i.e. keeping the oil at around 195F was a better option under all temperature conditions.

So now I have these questions: