Seeking Exhaust Advice

It's a 318-4bbl, 4 speed and the manifolds on there are Mopar high performance, but as I said, it needs exhaust work and I'm looking forward to the look and sound of headers.
My Swinger needs exhaust as well. It still has the homemade duals on it. (original Y pipe split) I will get a nice dual kit and keep the stock manifolds ir bolt on a pair of 68 340 manifolds. Eventually I will dd the 4 barrel and intake.