Engine and trans swap

[1967Bonneville]

I have a 99 expedition 2wd I swapped the 4.6 and Trans for a carbeurated 96 vortec 350 and a sm420 Trans out of a 1970 chevy c50 was wondering about building a clutch pulley system out of wire rope

 

[1967Bonneville]

Anybody have a rough idea on how much pressure it will take to depress the clutch with the wire rope system as opposed to a manual rod setup it had in the c50?