Wow Bombay, you know your kitties!
I have two Bengals at home. I love em! I think they'd be good truck cats, as they love to lounge. They are half-brothers, and one is pushing 19 lbs, and the other is an obvious runt at 12 lbs. I would recommend this breed if, like Bombay says, they are removed enough from the wild.
If you plan on getting two or more cats for the truck, I'd advise getting them seperately by about 6 months to a year. Otherwise, they could end up bonding to each other, rather than to you.
However, if you get one cat, the more likely you are to be able to train it like a dog.