which servo would be a upgrade for
my frst got no pedal fee,l i got at moment st170 discs with willwood 4pots braded pipes, but pedal feel is not good been told servo is not up to jod and mondeo master and servo is a direct upgrade any1 know which model i must go for mk1 mk2 mk3 also does it have to be the right year model ect any help advice would be great plz