h22a4 OBD2 into 88 Prelude OBD0

I am installing a USDM 97 h22a4 OBD2 into an 1988 Prelude. I am trying to determine what ECU to use, OBD2 or OBD1. I currently have a Place Racing OBD1 to OBD0 to OBD1 wiring harness. I can by an OBD1 ECU if i need to. I also have a full harness for the OBD2. Also the transmission has ATTS, does that effect ECU selection?