I think my amateur engineering would be a step up from the original engineering. It’s my wife’s car and we are probably going to drop another motor into it and dump itI applaud your efforts, but it seems like it'd be cheaper to just sell the husk and buy the EV. You're looking at $10-20k of spend that you won't recuperate, and 100 hours of work...much of which is fabrication...I kinda feel like the worst place to start is with the dead car you have lying around. If it wasn't there, would that be what you'd buy and convert?
This will be the end of my wet-blanketing, but do you really want an amateur-engineered version of a car they make from the factory for double the cost...?