1966 Ford Mustang Coupe Exhaust Sound Big Cam

Hey everybody! Here’s my mustang shortly after all the motor work was completed. Here’s a list of what all was done: Carburetor: Holly 4 barrel 600 cfm Intake manifold: Edelbrock RPM intake manifold. Upgraded this from my original 289 iron manifold Heads: Decided to keep my original iron heads. Had Them cleaned, magnafluxed, and milled, ported internally, port matched to headers, and port matched to intake. Screw in studs and Guideplates as well Valvetrain: new springs, new solid lifters, 1.6 roller ti