An electric crate motor you can drop into your car
One thing to bear in mind when that converting ice vehicles to electric is that they are constructed with a vertical firewall between engine and driver with lots of protection around location of fuel tanks and fuel lines. 
EV's are typically designed with a horizontal fire wall to protect the occupants from the batteries beneath them, which become unstable  in a violent impact and often burn repeatedly. The centre of gravity in an ICE vehicle is very different to an EV. It is therefore arguably better to build some sort of EV kit car with a crate motor than to attempt to convert an ICE monocoque imo