Just got a SI Harness

hi,

I needed those 4 injector plugs to complete my swap.
So i went to the junkyard and the guy sold me the whole SI harness for 30 bucks.
I can just take out my old DX one and use the SI one correct?
I wouldnt have to modify the injector plugs correct?
I mean I can just plug them directly up to my injector resistor box correct?
Also the distributor should fit corectly right?
Only thing I need to modify is the ECU correct?
I already have the 4 wires in the engine bay.
Thanks

what ecu do you have?