LOL, I didn't mean to imply you were dissing the big white truck, I was just so fervently agreeing with you ;-)
Don't worry, man.
My love of the nondescript white van nearly led me to buying one when one of the local universities was thinning their fleet. I didn't realize my wife was serious when she said to go for it until after it had sold.
There's also the car rules in Solo of Fortune 1, which are a decent mid-grade.
Interlock Unlimited (I promise Wisdom doesn't pay me every time I mention IU) has a good condensed formula for vehicle rules. More in depth than the FNFF but not as 'heavy armored combat' as Maximum Metal. Still, vehicle rules are something that both the player and GM need to be real familiar with before trying it. It can be either real simple or extremely difficult.
I've run a couple car chase/combat games but always spent some prep-time re-reading the rules beforehand. The few times that a chase or something popped up by surprise, I really didn't do as good a job running as I should have because we kept having to stop and check the rules. Nothing sucks the fun and excitement out faster than that.
We used a lot of hoopties. Theres some other cars in Neo Tribes, as well, i think. IU has some real basic sample cars.