all rst turbos came with sunroofs, heated front screen, electric windows, electric mirrors and xr3 didnt come with some of those

From already said, i work for a dealer and you cannot change the name of the log book from xr3 to rs turbo. The log book will always say xr3 and if engine has changed this will be different. Reason for this is the shell and car was originally registered as an xr3 and just be changing the engine and the parts doesnt mean it becomes a different car