the ecu that would prolly be best to use in this cars is going to be a p28 from a 92-95 civic ex/si for a d16z6, then just get the jumper harness to go from an obd0 to obd1 ecu (i cant remember who makes one) and yes your si trans should be just a direct swap iirc. you may need the si clutch and flywheel though.