ed,
My old '91 Civic basically came with that..although it was technically Dual Point..it had some sort of aux. injector below the throttle body.
Fortunately, the Si model in 1988-1991 had multi-point injection, so a lot of us "ricer kids" with non-Si models converted to MPFI either by replacing the ol' 92HP DX motor with a different motor & ECU that had it (and re-wire the car, which is what I did) or you could just get a MPFI manifold, and make some wiring modifications to the car..might have had to change out the ECU also...I can't remember right now...it is a little fuzzy.
- by the time I was all done, I had ~135 HP in a 2265lbs. sleeper car.