The stock ecu is a p-30 so your best bet is to find that ecu, otherwise another option is to use a chipped p-28 ecu from a civic ex/si. Your best bet is to use either of those ecu's but the gs-r (p-61 or p-72) will also work.
As far as a/c goes you will need to use the ac/c bracket from a del sol vtec.

Clutch will depend on how much power you plan to run. You don't want to run a clutch that is too agressive for your set-up.