Custom exhaust help

I would like to be able to run the exhaust out the back but there is no way that large of tube will fit, and I don't want to run 1". As far as clearance goes there is no power steering (no way that would fit) the alternator will be about 2" away on the passenger side and the entire exhaust is a good 8" away from the radiator. This a 65 Dart and the motor is a 440 there are no long tube headers made nor would they ever fit. With the exception of fenderwell headers, which I don't want or by some miracle an exhaust manufold that would fit, this seem like the only choice.