But which one would be best for autocross? 

Is there no street cleaning or parking restrictions where you live?! 

The Mitsubishi Montero fits all these criteria. Bet you won’t find another in the parking lot and it definitely fits the “old SUV that looks like a brick criteria” if it’s pre-1999. Which of course it would be.   

Anyone notice the third brake light in the rear window? Looking at one of the top left pictures in the group of smaller pictures.

This actually happened to me only a few weeks ago while traveling around Iceland.