I think it was Steve83 that put one in the gauge cluster with enough room for the volt guage, also I have seen an adaptor that screws to the stock radio opening that allows a 2 shaft type radio but they don't seem to come up too often but it seems to me IF the stock opening is big enough for a 2 shaft type radio a plate could be cut to fit and a slide in type new style radio could be used. I think I bought the black plastic textured sheet of material to do just that at home depot some 15 years ago for a custom install.