The vehicle in question is a chevy cargo van that he's turned into a mobile office since he job takes him on the road.
We are planning to route a A/C line to it to keep it extra cool. Not to mention there is going to be a huge zalman cooler for the CPU a socket7/A heatsink on the north bridge and coolers on the memory modules. There will be a single 80mm fan to blow out the spent air out keeping a constant flow of cool A/C air.

I've had a carputer for a great while and have rebuilt it many of times for upgrades and repairs so the cooling part I got down to a science. The hard part is how to route cables with minimal signal loss, mounting points and keep the hard drive from taking a dump unless I can talk him into SSD.
To live is to let die