Carb boots from the 01 need to be used so the airbox will line up correctly.
Y-pipe is the biggest challenge... the VES motor is tipped a bit different. I've seen some need to be modified, some worked.
Electrics from the 05 need to go in, CDI and harness along with the reverse button if you want to use reverse. Hood harness and gauge you might have to fiddle with if you want the DET light to work.
I'm a fan of the motor plate instead of just the 2 straps. And a good torque arm on the front left.
Make sure your clutch is in excellent condition and balanced.
sled_guy