ok i ve been doing searchs and found that it seem you need the HAc sensor. I have an 87 swapping in the jdm motor the motor mounts are the same but there saying the hac sensor was switched to intagrated with the ecu in 89 and the jdm motor doesnt have the hac sensor plug and my us spec one does. any info? will i have to put my old harness on the jdm motor? i think the jdm motor had a auto ecu and using my mt. im guessing thats what the a/t stood for anything else about the swap would be great