Post some pics when you have it done. Since matching up the speedo cable was going to be an issue and the fact that I wanted to keep the firewall clean as possible, I opted for a GPS speedo.
That is what we did. I have a original if needed. I am looking for a good 12 pin plug to use to make the harness connection. I may just fab something out of the old cluster plug b
Sets in the front. I left about 1/4” Had to trim a little more in gauge areas but can do that later. I used epoxy. I also painted the old cluster frame before assembly.