I would like to see the El Camino in GT5. And even though I'm not the biggest fan of American cars i would also like to see the Foxbody Mustang, the GTO (70's) the Firebird (Formula please). These cars were all forgotten and I don't really know why.
But I would also really like to see the the MK1 Supra.
The El Camino is a great car in automotive history. It was something that no one really thought of, Putting a High Powered engine into a truck, that really changed things back then.