i have a cooler in front of the rad but am looking at a different add on. i am looking at a tube 3/4 to 1 in or more in diameter that would neck down at both ends and be approx 3 ft long or more to run along the frame adding great cooling area as the flow is slowed greatly plus also extra capacity. basicly a hyd seperate resivoir. i was also looking at a alum 2 gallon resivoir that would sit in front of the rad shell(look like the old fuel injection tank)
i have noticed on my car at the strip a couple quick passes and loading the trans at the lights it heats fast and one can tell the differece in the way it shifts.
a super deep pan would also do the same thing any capacity helps the cooling syst.
for a air cooler it has to be in the wind somewhere to work properly.
i have seen sone guys bodge together a small car rad fan and a big tranny cooler to move air in tight areas i suspect they work good.

just my 2 cents