What "Should" be done is to obey the law.
The law allows rebody'ers to fill in the DVLA Form V627/1 which is used to declare where the bits for the kit came from. It's a points based form where different components add up to different number of points and if enough parts come from a single donor then the car keeps its original registration number. Otherwise it might get a 'Q' or even have to go through a full IVA.
But one element of the form is that it also allows the car to have its description (ie make model) changed to reflect what the builder wants to call his creation.
@Dxbolton, for example, (If I'm not mistaken) completed that form and, as is his right, changed the description to reflect what he built.
I, on the other hand, believe that I have simply added a full body kit to my Z3 but it's still a Z3 and is registered and insured as such. (ie insured as a z3 with full body kit and fibreglass panels). I might even put a z3 badge on the back.
But in the case of us 507'ers we still have BMW badges. If I was plod I'd be pulling over that ferrero that appears to driving on plates stolen from a BMW.
Anyway. To cut a long story short the DVLA allows rebody'ers and kit car builders to name (ie make/model) their creations if they wish and who are to say it's right or wrong.
