Personally I'd stick with your GT. It wouldn't cost anywhere near as much to get that to 300bhp and then there's the running costs which would be much lower! And the fun factor, I reckon 300bhp in a Starlet would probably be more useable day-to-day than 500bhp (RWD?) You could even swap everything over to an EP85 giving you the grip factor too still having money left over Skyline's are cool cars but if I was to get one/ it'd have to be a GTR! And I'd rather have a TT Supra over one of those anyway