There are actually several around Houston. There are a couple in Crosby, TX which is about 30 minutes from downtown. Xtreme Off-Road Park and Down South Off Road Park. And Sugar Hill Off Road Park seems to be getting quite popular now a days. A lot of Subie boys are starting to get wind of it...
I've had 2 different 2nd gen 4runners both with the 3.slow. I've never been a fan of rebuilt engines on any car, but if you're limited on cash, buying a used 3.0 for about $300-$500 is cheaper than rebuilding it. I would love to get a 3.4L supercharged engine, but that would probably cost...