IMO you should stay with the plastic driveshafts as the metal ones will bend if you run it hard . Also I see no need for a steel spur or the RRP slipper as long as you make sure the stocker isnt locked down and is working .

As I stated earlier RPM a arms , Lunsford Ti turnbuckles/toe links , and the M2C rear pin block and you are pretty much good to go . Maybe get one of those rear chassis braces if you think youre gonna bash hard .....