'64 Barracuda Exhaust Help

Looks like I am gonna use the stock manifolds and run them all the way back. I don't think the 4's and 5's look good with the turn downs in the back the valance (in my opinion) comes down way to far. I am going to cut notch outs like the formula S cars have on both sides. I did the Trans crossmember today just have to weld up the braces that go across and that will be done.