budget street motor 360 or 383 for 71 duster

It don’t look to bad. 1-3/4.
http://www.ttiexhaust.com/MoparClassics-Headers/383440-134/TTI383440-134.jpg
2 inch
http://www.ttiexhaust.com/MoparClassics-Headers/440-200/TTI440-200_b.jpg