G'day peeps

I've been trying to search up and down, trying to find out what is involved to swapping a b18c (96 JDM ITR) replacing the b16a I currently have

A few questions I wanted to ask was

What will I need? Can I use my existing loom?
Thinking since I'm already running a b series motor, unhooking the engine loom from b16a and throwing it on the b18c shouldn't be a problem

I know the ek4 is currently an obd2a and the JDM 96 spec itr is also obd2a

Should I be running into any problems? Will I need to run a conversion harness? Ecu will be hondata

Kenny