My project car is 1994 LS/Vtec with a p28 ecu. I already have a AEM EMS ecu #30-1010 for a 2000 civic. I know the p28 is obd1 and the AEM ecu is obd2 but can i just get OBD1 to OBD2 Conversion Harness to make it work correctly. Or should I get a Hondata s300? The wiring harness will cost about $125 and the Hondata s300 $500. Which would be better? I plan on boosting soon.