another pedal box question

[Rik178m]

how do you work out the height of the main hole for the master cylinder? I'd like to drill it before welding everything.

[deezee]

You offer up your master cylinder, so the input is inline with the hole on the pedal. I moved mine up a few mm as the master cylinder off the Sierra seemed the wrong size for the pedal box?

[Rik178m]

gotcha. So i have got to weld everything together first. Thanks.