I have an 84 cj7 w/258. I will be swapping in a 304 within the next few months and would like to know which wires I need to keep under the hood and which ones I can get rid of since it currently has the computer. Do I take the computer completely out or do just find the wires that come out of the computer? How many wires will I keep? Thanks, please be gentle, I am no machanic.