If your car has to run off race fuel and cant stop at a everyday gas station to fill up--not a street car
If your car cant make a few hour trip on the interstate and in stop and go traffic without overheating/destrying rods or whatever----not a street car
If your car is gutted down to a tin can, well i guess it could still be a street car just not a comfortable one
If your car has a fuel cell---not a street car
If you your car does not have standard glass windows---not a street car
If your car doesnt have a stock style suspension----not a street car

im sure theres more but im tired