Ok so i have a 90 4 door DA that has apperently been swapped before i bought it. It has a B18B1 instead of a B18A1. I know that they started making the B18B series in 94 and it's OBD1. My car is OBD0. How can i check if the car has been converted to OBD1 or not? And do you even have to convert it, or can you run my motor without wiring a new harness? Any help would greatly appreciated.