Well there's more involved than that. My LT1 conversion now runs, still need to do drive-line work and some other electrical. Once tested and working, I'll do a full write-up on the procedure. But in a nut shell, you'll need the electronic stepper motor and a driver to make it function. More than likely, you'll need the PCB from the donor cluster you choose. The stock pointer from my attempt is designed for a smaller pintle shaft diameter and does not directly mount. You could disassemble the needle and mount it to the base of the needle from your donor parts I suppose. I think for my purpose, I'll repaint in an attempt to get it to match for now.