a timing controller aint gunnah help you control your injectors...
the 910 is a good choice, and yes cam it does fit in the std bracket with a bit of modification. youve got to worry about low/hish impedance when looking at rx7/rx3 injectors. a mate of mine with a VL put these in his car, and just driving around for a few days before tuning ruined his engine as the injectors were spraying so much fuel it glazed the bores.