My MK3 LS is in great condition mechanically, but now I'd like to add some higher end interior features, my desire is to fit a complete interior from the Si/SRi or GSi models. Before I do this, is there any issues I need to consider, the only thing I don't plan on changing are the dash clocks them selves(but seats, dash/console, door trim, roof lining, electric windows etc. are due to be replaced).