P1000691.JPG
Note that both side used to have a similar shape and ribbing. Any strength lost by removing this 3rd rib and side ribs should not matter since the braking effort required to stop a lightweight 240z is considerably less than that required to stop a heavy 4runner at almost twice the weight of the Z. This is my own opinion and nothing more than that, so you'll have to make your own judgment call on this.
P1000691.JPG
Note that both side used to have a similar shape and ribbing. Any strength lost by removing this 3rd rib and side ribs should not matter since the braking effort required to stop a lightweight 240z is considerably less than that required to stop a heavy 4runner at almost twice the weight of the Z. This is my own opinion and nothing more than that, so you'll have to make your own judgment call on this.