Hi Nas
Don't be so keen to swap to the 5spd gearbox, you'll find that it's a far cry from the luxury feel of the gt8 cvt.
Take this from somebody who have own(ed) both of them
You do have to take care and make sure you have the tranny fluid changed properly ie, correct fluid, every say 80-100k
Beware of the odometer in import cars, in general take them with a pinch of salt.
Look at how worn the drivers seat, brake discs, etc instead.
I did not trust that my GT8 had done 40+k when i bought it so i bit the bullet and got the tranny fluid changed to be safe.
IRev in Bayswater is very experienced with v35 and they have the scan tool. They got the tranny oil at the best price for me.
Call Nuwan 0422 807 393