318 camshaft swap 260 duration

hey guys going to swap my rebuilt 318 1971 block camshaft was looking at a 260 duration at 440 lift comp cams it will be for my 67 barracuda it has 600 cfm eddy carb eddy lb4d intake with 1973 340 exhaust manifolds in the rear I have 294 or 293 but I'm going to swap it for 355 ratio. Would this be streetable driver? And am I in the right direction.