I drove my 89 5.0 for a weak with no clutch when the cable broke. I have also shifted my 06 gt with out the clutch. Justto see if it was posible if the need arose.
When I bought my 06 Mustang I drove up in my 89 5.0 Slid it into a parking slot. Got out ant told the salesmen that was sitting on the front step I wanted to look at the 06 beside him. He wen't got the keys and through them to me and said take it for a spin and we will discuss it when you get back.
Besides that to put remote start on a manual you have to bypass the SAFTY switch on the clutch peddle. Ya think lawers would have a field day with that. Just ask the guy that put remote start on his gt after every shop refused to do it. Even dummer he used the unlock button on the fob for start...