How are you gonna connect the engine to the axle?
Engine pto gets the driver half of the cvt. The axle has the big sprocket.
There a part in the middle. The driven half of the cvt and a small sprocket. These will need to be on a shaft of their own. A jackshaft.
The cvt halves will need to be spaced at a fixed distance from each other. The chain side of that will need to be adjustable for various reasons. Chain stretch, sprocket size change...
Have you been reading up on steering geometry?
How about the length/width ratio?
Seat, steering wheel, pedals, linkages, lights ,stereo?