The rear suspension including the drive parts are a huge lump of metal and to get this all done consider some weeks of intensive work.
This car is an Automatic US specifivation hense it had a 3.31 rear end ratio whereas the European had a 2.88 ratio as in the States the max speed would be 115 km/h ans in Europe on especially in Germany you can go full blast up to 230 km/h.
Nedless to say that we do not want to carace with this 2+2 but we want to have is silent and less heat producing when travelling or should I say cruising. 265 bhp should be enough to get going even with the longer Europen ratio.