1. yah just check the terminals and the grounds
2. yup
3. up to you.. doing the rear will be fine, but im sure the fronts arent too far from being shot.
4. AITA ships.. I'm in Iowa and they shipped UPS right out to me.
muffler is one of those things thats up for personal taste.. find one you like and have it welded on.
heh well sounds like you got a nice lil project car on your hands then... good luck with it.