Yeah ive heard of this being done before, although i can't confirm ive seen it on a rolla, what i do know is a mazda 121 master and booster fit straight up to a rolla, only modification is fabricating new brake lines from the master to the "T" piece on the firewall, i had this setup on my ke55 when i had it, also got a reco setup (mazda) sitting in the shed............somewhere, if ya interested I'm willing to sell it............cheap!
cheers phatke30!