I think lumpy can help me out on this one. Just completed my 1j conversion into a 1986.5 MK3 supra. I have kept my old dash because I think it looks better than the JZA70 one. But I can't get my tacho to work. I tried to get the signal from the "IG" terminal on the dianostic block but that dosen't seem to work. Now I am fresh out of ideas can anyone help? Also the AC compressor on the 1JZ is a three wire type as opposed to my old sigle wire type, can that still be made to work with the old dash? Or can the old 7M-GE compressor be bolted in? Thanks.