How to achieve negative camber (front)?
Negative camber is achieved by increasing the length of the control arms. The most common option is to install control arms from an 81-series chassis, but it's important to note that they have bushings with a larger bolt diameter. So, you'll need to drill the subframe mounts. For even more aggressive angles, you can install control arms from an H61, but for civilian use, those from the 81-series will suffice.
Important: along with them, it is necessary to replace the steering rack tie rods (e.g., from a JZX100), and adjust the tension hole.