Another caveate about having exhaust dump before the rear of the vehicle is tha exhaust fumes can enter the body of the car. If you have rust holes in the trunk or floor pan you will get gassed.
I have thought about that... Floorpan is solid, trunk is not-so-much... I'll have to patch some holes and see if I get fumes, if not then i'll be happy, if so then time to re-plan exhaust... :/