[Fraser]

CobraEd,

In answer to your question:

1. It would depend on what make of roadster you have
2. It would depend on how much finishing the builder did

Simple answer is most probably, you would be surprised what is behind the dash in your daily driver, however remember at present my car is wired to check continuity and enable engine start, the dash will be completely stripped down for covering, and at that time most wires will be placed in a cable loom and shrouded.