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1 While removal of the original points-plate assembly is required, installation in a Ford distributor is still relatively easy. The included step-by-step instructions are clear, easy to follow, and logical provided you follow them closely and with a deliberate approach. We had the 351W in our '69 Mustang up and running with the XR-i in just over one hour, and that included photographing the process. Here, we've already removed the distributor cap and rotor. We also removed the four plug wires from the passenger-side of the engine so we could set the cap and wires (and coil wire) completely out of the way. Then we began the procedure by unscrewing the stock points as shown.