I finally finished my pedal box and dual master cylinder setup, with hydraulic clutch and drive-by-wire throttle. I used the factory pedal box and welded a few pieces of sheet metal to it to adapt a nissan 350z accelerator pedal position sensor. It all fits under the factory floor board and carpet. I wanted "stock appearing" and that's exactly what I got.
https://forums.pelicanparts.com/porsche-911-technical-forum/1160332-early-911-930-pedal-box-scrs-style-dbw-g50-clutch.html