318 build up

The 273 in my Barracuda was the 2-barrel 180 hp. Now I have a Holley 600 dp, Edelbrock Dual Plane and the 714 heads. Hydralic cam (do not know any numbers) 0,30 overbore and stock exaust manifold but with a 2 1/2 " double exaust systems with flow trou mufflers.

What kind of effect may this setup have?