Yeah well I discovered the intermediate plate difference after bolting up my flywheel clutch and trans to the 83 motor. DOH!!! I assumed the front sensor ran the tach on all of them. I just don't know if the tach will still work without the IP sensor wire hooked up and all that emissions bul Zip taking up room on my floor. Being that I wasted a day swapping that plate and trying get unsuccessfully to get the hex plug out of the water jacket for the second temp sensor I sure hope it works. My first turbo manual swap afyer years of wanying to, living without a tach would really annoy me.