Well this might crak you up, I found the centre for the hole by lining up the original clutch pedal straight through the mounting bracket and firewall and drilled a hole staight through it between the two studs you see on the firewall ......then I worked up to the correct diameter hole to the clutch master cyl. I used the 180sx clutch master, from the half cut, I then machined the mounts on the master back comletely and pressed a new fabricated bracket onto the master with matched offset on the braket to the studs on the firewall. Then you have to drill a hole the right height onto the pedal for the fork to connect. good thing this is adjustable. I hope it made sense. I passed the Mod Plate inspection too