273 exhaust?

That's a beautiful barracuda, I really like that color. I had the same stock 273 commando in my 67 barracuda. I put the 2.250 dual exhaust on it from accurate also. A couple problems I had were; when I ordered the system it only came with 340 head pipes for the hipo exhaust manifolds. They have a different flange than your 273 manifolds. So I bought a set of 340 68 A body manifolds, they did not fit my 273 heads. They did bolt up but had about 1\4 inch open spot on the bottom of the manifold. Eight exhaust leaks. My heads don't have a big enough machined area below the exhaust port for the manifold to seal aganist. Maybe 318 heads do, I don't know. So I had a mufler shop make some head pipes for me. The second problem I had is that when its damp or eaely morning and the car is idling the exhaust doese'nt get hot enough to burn off the water vapor that comes from gasoline. When I'm going down the road its not a problem, just when its idling when its cool out. It spits out black water droplets on my bumper. Bob