ditto.
you made a big mistake buying that motor for your car. its going to cost you more to get it in than it would have been to pick up a b16a2 from the 99-00 si.
tranny won't work, not bolt up to the mount properly.
you still need the 99-00 si rear mounts... consult our 6th gen swap section for more on mounts.
the electronics won't work. look into getting a chipped p28, obd2-> conversion harness, obd 1 dizzy, alternator, and injectors, toss the resistor box....
man i'm sure there's more.
IMO, stop now- sell it, and buy the right thing before you hack up your car and the motor.