Probably try to get in good with a local muffler shop. Tailpipes won't be too bad.
Naw, you're gonna need some bends to go over that axle.
You are not going to home build tail pipes without a welder.
Cheep solution for getting it out from under the car Have some 90s bent and dump it in front of the rear tires. You may or may not need to move the mufflers forward for this.
I would save for real tailpipes.