I guess you answered your own question then.
I think the days of a coach builder are all but gone.
Yes, many tune engine wise, fiddle with different lights and the items you mentioned.
I took your question as why people don't go further than the known mods that are carried out...
Have even today several coach builder, i know some, i have ask Mark Nugent (it's a famous Australian builder) is reply is simple he said already several years i dream to work in a Morgan but he said the 2 peoples approach him be too conservative or not really sure if they want, so this cannot really be consider as the majority of us.
