electric classic car conversion to go kart

[Nickciticar]

I am nick and new to forum. I restore vespa scooters and an electrician by trade. My question to you is how can i hook up a heavy duty axle set up to a sebring vanguard citicar. i was originally thinking of doing a live axle but am worried about bad turning. i have read through a good amount of posts and i am leaning on doing a live axle with a bearing on the other wheel so i can mount the disk break and motor drive sprocket anywhere on the shaft. this cart with rider and battery will weigh around the 1700 lbs so i need it to be heavy duty. also i am sourcing a motor and controller through D&D systems. top speed is to be around 50mph. i am also planing on making a sub-frame out of steel for the car chassis to be bolted on because the frame is aluminum.
thanks for your help i am looking to take a car that has no parts being made for it and making it a daily driver in the nice weather.
I am looking to find out how to make this axle set up work what diamater rod should i use for this kind of weight and where to source 14 inch tire hubs for the cart. it uses 4 bolt trailer tires on the car 14" as stock. thanks again

 

[Nickciticar]

Looks like 1 3/4 is the size axle I will need. A bit overkill but I know I will have no problems. Looks like I can do a live axle from my drive wheel to about 1/2 the way into the frame to mount my disk break and my drive sprocket and on the other side use a stub axle. This sound right to you guys?

 

[MadManAndrew]

Rather than go through all that trouble, just steal a rear axle out of a golf cart. It will handle the weight and has a differential so you can drive both wheels.

 

[Nickciticar]

My only problem with putting in a diff would be having to find drum brakes for it and the more matinance that would be required. It does have a working diff in it right now but by eliminating it I could have an easy set up for disk breaks and for motor placement. I don't want to weld the frame since it is aluminum but the steel sub frame will be a blank canvas. Plus I am a bit confused on how a diff setup will fit and mounting with part compatibility.
Thanks for the thought I will look into it but I am nervous going that route.