66 valiant with 360 help needed.

If all goes according to plan i will be picking up a 66 valiant this weekend. the car is a roller with no engine and trans. on sunday i will be pulling a 5.9 magnum engine out of a durango. i plan to run the 5.9 with stock long block and a eddy intake and 650 carb. what is a good choice for exhaust? in know these cars are tight fits with the small blocks. do any a-body manifolds fit? trying to get this going for cheap. i would even consider a header in the 300-400 range that fits without hanging super low.