there was a company back in the 80's iirc that had a kit car that used a bike stuffed in the back like that, It was a bit longer in the leg room, but then your feet were well past the centerline of the wheels (meaning your feet are the Crush Zone like an old Indy or F1 car). The selling point was you could easily change it back to a Bike. I think they were still too long and complaints were it handled poorly, and reverse was a hassle (it had a starter motor set up somehow that kept breaking during the testing).