Need some help with Exhust system.

So i have a 1973 Duster that has a 78 360 motor. Has been rebuil before but i dont know what has been done to it. Anyway. I need to changed the headers on it because they are rusty and i know of 2 holes on it.
But worst is that they hit some part of the steering mechanism (not sure what) therefor i think that they are not correct headers for a duster.
I wish to just change the whole exhust syster while im at it so i will need some new mufflers i wanted to get some recomendations from you guys on here. agressive but not so bad i cant have a conversation in it.

So in short i wish to get some recomendations for new and correct headers (or maybe just go with an exhust manifold?) and mufflers. X or H pipe?
THANK YOU
-Elis

Ps. Sorry for long post and bad english.