AE82 Master Cylendars

[.:2DR-FTU:.]

Hey guys,
Quick question. I'm about to convert my AE82 sedan to 4A-GE. Is there any difference with the Master Cylendar or Brake Booster in these babies, ive had varied responses. A guy that works at pick n payless reckons the 'ratio's' are different, saying if i use the shit i already got, with the twin cam front n rear brakes, that the brakes will just lock up, how accurate is this? Any other info regarding this straight over conversion would be appreciated! P.S Im not going to use the power steering and air con, how hard will it be to not use this?

[WiLo]

yes they need the bias adjusted as far as i know,
not sure entirely so dont neg rep me if im wrong
but i think that if you just put the disc brakes on the rear and keep brakes same as now, the rears will lock up well before the fronts