What you wanna know about heads for anyway? You already know the standard head flows pretty poorly, and a POTR one not much better even with its huge valves.. at least your head and cam are suited at the moment, so they aren't going to cause many problems - it's only a 1.4 8v, it's not like they pump loads of air round. I fitted a FRC to a full SEB2 setup and only gained about 6hp and lost alot of low down torque.. made the car worst if I'm honest.
I'm genuinely interested to see the results, as the MS is a cheaper alternative to Motec or DTA or whatever.. but for the cost over a SEB4 setup, I'm not sure it's worthwhile parting with 4x the money for a few hp more. Full-blown build with a T28 or bigger, sure.
The whole angle of this debate is the cost. Always has been. These cars are worth less than a grand now, spending that on management isn't really the way forward, unless you have a limitless budget (like me, and the Hans once did).