I don’t know of any regulations against one’s ability to convert a gas car to electric. In my state, there is no emissions testing even, but I don’t know how it’s anyone else’s buissness what you do with your drivetrain, as long as it’s not polluting (sound or environment)
Well yeah, if your taking on an EV conversion project get ready to spend $20-30K in parts and at that point your donor should be selected carefully, and with a manual transmission. This is serious hot-rodding, no need for regulations.