HEY ROACHIE, I'M ABOUT TO CUT INTO MY HARNESS ON MY 99 SD 12VALVE 47RH CONVERSION. I HAVE READ YOUR POST ABOUT THIS IN THE PAST BUT CAN'T SEEM TO FIND IT THIS MORNING. I THINK I ONLY NEED WATER TEMP,OIL PSI, AND A PAIR OF SHIELDED WIRES FOR THE TACH. DOES THIS SOUND RIGHT TO YOU ? thANKS FOR ANY HELP. BRAD