In my early days i worked for a guy who built a Seriously fast RS Van, he had a rad made for him. It was clever how it was done, he had a massive rad made that was nearly 2" thick it sat right across the ft of the van but was not as tall (i'd say 3" smaller in height) he then fitted a 4x4 cossy IC above the Rad. That worked well but it was built with a no expense spared Mentality.

We also experimented fitting Ic's flat with Ducting feeding the Air through them. We kind of copied it of Jap Touring cars.