the easiest thing for you to do is to use your cx harness that's in your car now.
drop the motor in.
convert to 4 wire o2.
run the wires for vtec
run the wires for knock.
swap plugs for the distributor, alternaotr and injectors- OR, just use obd1 b16a del sol vtec) distributor, alternator and injectors.
you're done.
its really not that much work.
getting another harness, you're still going to have to do some of the same shit. might as well make it free.
theres acticles and how-tos on all of these things here.