[cleanspeed1]

If the car is out of line, it will affect the gas mileage because the friction has increased quite a bit. If it pulls aggressively, then you need to make sure that after the accident that the unibody didn't get tweaked.

If the motorcycle is under a certain CC range, you shouldn't need a license. Every state is different, so check the laws. A bike in the 125-250cc range will be more than enough for commuting, and even have enough power to go 2 up.

Sounds like you want to keep driving the old girl. There are some places that specialise in the Lima based 4 cylinder and complete 2.3s are a dime a dozen since no one except circle trackers and eccentrics play with them these days. Esslinger is probably the best known, and there are a few people online that like them.

Find a roller cam motor out of a Ranger and rebuild it stone stock. Or if you find a low mileage unit out a wreck, just put it in as is. Just make sure that all the cylinders are sealing properly. If mom and dad work on cars, it shouldn't be much of a problem.

And learn how to work on your stuff.