Try talking to PLMS looms, they basically get the stock SR20 loom and modify it to fit into a 1600 with only like 4 plugs needing to be tapped into the stock cars loom, plus he can put a tune into the computer, (nistune) so you can have upto 4 different maps for the ecu, ie valet parking - hit a switch and it has an RPM limit to your choice, say 3krpm, and so on, an economy fuel map, and an all out power map, plus it gives you the ability to tune it whenever you want to, and it's pretty cheap too
He does them for 1600's but what is the difference between one of them and one of these when it comes down to a bare engine bay, the ignition side of things are the same.
They strip the loom, remove and add wires where required, give you a neat monuting panle and fueses all set up etc
Would be what i'd do
http://www.plmsdevelopments.com/