Any advice welcome what's best centre push or slave and where to buy from.

Its in a Cortina and I have a pedal box which will take a master cylinder and I have approx. 50mm clearance between bell housing and tunnel.

 

Sounds like you have enough space for an external cylinder but your clutch type could dictate which option you go for..

 

Heilx paddle and cover,

Currently struggling to get it to work on a cable I have a shitty OBP pedal box had to lengthen the pull arm to get more throw but now the extra leverage is just twisting the hole box, hoping a hydraulic system will be a bit lighter on it,

 

A hyd conversion using an external cylinder will fix the issue and have a much lighter / nicer pedal feel.

 

Will be giving you a call in the morning, I have a spare .625 m/cyl will this be ok for the pedal end.

What modifications are needed on the bellhousing.