Driveline length etc is all predicated on the "critical speed" the drive shaft will see.... so it has to calculated using the tranny gear ratios - rear gears - tire diameter - and red line.
The shaft DIAMETER will need to be increased as the length grows, and also the type of shaft material used, and that will depend on the critical speed of the shaft.
A little math -- or better yet -- some phone calls, or emails, to the big manufacturers should give you the right answers.
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