This would be a return to the coachbuilding days of early motoring when you could have any style of 'horse buggy' that you wanted put on your Rolls Royce chassis.
The Tesla drive by wire technology and one big screen means that you can place the driver wherever you want. Admittedly older cars don't have the A pillar strength so you would not be able to exactly replicate something like A DMC, but I want cars to be like die cast toy cars, where there is an upper that clamps on to a chassis.
As it is, EV conversions where the electrics are placed in the boot, transmission tunnel and elsewhere is a fudge I don't like. This is because you have got too much old, crusty ICE car junk going on, whether that is wiring or the mass of ancillaries in the bonnet.