very doable...especially if you can get the drivetrain computers and harness's from a new CTS-V which has the SC and intercooled N* engine with the manual trans already setup for RWD....
but remember you would practically need everything from the CTS-V
hope you find one that has been totaled in the rearend...and even then figure on spending over 10 grand for that...then parts/labor to install and wire the G/A body RWD car with all the necessary computers and wiring...
it would be a bitch...but it can be done...
anything is possible with a plasma cutter and a welder and some good old Redneck engineering...
here is a link to a N* swapped Monte carlo FWD
http://www.mymonte.com/discussion/viewtopic.php?t=10729
_________________
Psychotic Gearhead/Redneck/Mekanik
94 Olds 442 Twin engine's! 6.9L/425 cu inches and 12 cylinders!
13.81 @ over 98 MPH! consistent 1.9s 60'!