HI-PO Exhaust manifolds or Dougs Headers?

Hey guys, In the process of restoring my 72 Swinger converting to a 340 4 speed, motor is pretty much stock except for purple cam, Edelbrock RPM and Demon 750. Got my hands on a mint set of 340 Hi-Po exhaust maniflds and also a perfect set of Dougs ceramic coated headers, now the age old question which set should i use? what do you think?
Thanks