What all parts are needed for cruise control to work on a SHO? I am working on rounding up these parts for my 90. Apparently at some point, someone removed cruise control from this car. I know it needs the big round diaphragm that all the air hoses run to, and the air hoses, too. Anything else? I have the stock steering wheel back in the car. I am wanting to put the horn back in too, that is missing as well. If I found these parts off of another year gen 1 or 2, would they have the same electrical plugs?