Reading thru the Shell Valley Forums (this site) I gather the Brakes had top foot box mounted master cyls. The clutch was a cable operated affair.
It appears about 50% opted to install floor mounted pedal boxes.
See post #4 here.
Shell Valley Foot Box
And "Master" search results in the Shell Valley Forums.
Club Cobra - Search Results
That does suck Shell Valley can't supply a build manual. Instills a certain lack confidence in aftermarket support for sure.