I'm after some advice on running a remote servo setup with a tilton pedal box

Basically my servo and master cylinder on my mk2 base model fiesta are fouling my new gearbox setup I am wanting to run , and if I change to run an xr2 setup it fouls my jenvey inlet manifold so my only option is to run a pedal box setup from tilton , but after speaking to various people they say that the pedal you get from this is hard to use and that the brakes don't respond well, as my car is a road car with 425hp this isn't really and option!

So I've been looking into a remote serve setup and wondering can I just assist the front brakes and leave the rears straight from the pedal box? And also what type of sevro to go for?

Any help or thought welcome cheers Dean