Steve,
Let's start at the beginning... Is your ignition switch in the column or is it dash mounted? If it's in the column, what kind of column do you have? If the switch is dash mounted, how many positions does it have and how many terminals does it have on the back? For instance, the one on my roadster has 4 positions (Accessory, Off, Ign, and Start) and 4 terminals on the back (Battery In, Ignition, Accessory, and Start). Why do you need a separate start button? Is your switch only 3 position/3 wire? (Acc, Off, Ign) Why are you using the Ford solenoid? I used to run one on my stock cars for safety reasons, but never saw the need on the street... Just wondering.