i don't think traction should be a problem as the car hooks perfectly now with more hp and torque than the 6.4 is going to make its a full fiberglass pontiac body on a custom built b and b race car chassis with 4 link rear and gear wise we can change gears to whatever the car runs best on but why would wait have an issue as far as loading the turbo?
Just from what I have seen lighter weight cars dont seam to load turbos as hard.
Example my buddy has an elcummino with a 12v in it and ran a k31 and a 64mm turbo and could only muster 300 hp according to trap speed where a full size truck should be 500 ish. Always been like that on every turbo set up.
Car has slicks and 3.08 gears fwiw.
I have seen others have similar issues
Maybe im wrong but that's my personal experience with it