I am in the process of setting my van up for a larger engine and i have just mounted my oil cooler. I thought i would post it up as there isnt an awful lot of visual help on the forums about mounting coolers and 'scoops'. Hopefully this should help others when they come to fit theirs.
I have the added difficulty of having under belly pans due to the double doors. Therefore restricting the room to fit one. I also run the bus as low as i dare so cant get away with hanging it too low :S
So here we go...
This is the area i have to play with. In between the torsion tubes and the first chassis rail.

I am using an Empi 72 row oil cooler with fan. I have 3 'U' clamps that mount one plate to the torsion tube and a simple right angled bracket mounting it too the chassis. Then there is a scoop that should aid a bit of extra air flow at speed.
Here is the cooler and brackets off the van...



here is the brackets when fitted...


and with the cooler...

and scoop...


Im hoping the scoop isnt too low as i may end up hitting it... i took it out yesterday with the brackets and no cooler just to see if it hit anything... no problems... but i dont know how i will come off if ran over something... i probably only have a few inches of clearance. I may end up changing the scoop slightly.
hope this helps anyone trying to find somewhere to fit theirs.
Please, if you could add your comments on here too, it would be much appreciated (positive or negative). As i said at the beginning, i wasnt able to find anywhere about mounting coolers, what it looked like when fitted or what can be classified as a 'scoop'. So i have no idea if this is what has been done in the past etc...

Peace!