I don't have access to my data until I'm home next week, but I'll post then. I doubt if you have enough rear effort.
I have the 164 fronts, Wilwood 4-pot rears and a dual servo. Yes, a real mongrel which will have many grimacing! This is on a Hawk which only has a 4:1 (IIRC) pedal ratio. I can't remember my master cylinder size offhand as I've been through several.