The block will be an h22a and the head will be off an h22a4 along with an m2b4 transmission. The motor will be going into a 98 SH. I will be running a jdm obd1 p72 ecu with hondata along with the obd2 to obd1 harness. My question is will I have to modify the main wiring harness or are all the plugs the same ?