1985 ATC conversion to electric

Hi everyone,

I have an 1985 ATC70 that I was thinking of converting to electric for ease of use, before i even start with the project I was wondering if anyone has done it before and what Motor / Controller specs have you used.
I would like it to be at least as fast as my other ATC70 108 stroked which really ripps

I have seen on internet several ATV conversions but for larger and heavier machines and I am really confused on what type of power (watts/amps) the small ATC70 needs to get it going.

Any infor is more than welcome
tx