Cam Ideas

If it were mine with those goals in mind, I would be living by the K.I.S.S. principle. That means forgetting about the idle sound and look for a stock replacement LA 360 hydraulic roller. One of the mileage improving designs and add 1.7:1 ratio rockers to do the work. It would make gobs of bottom end torque with the 3.23 gears and air gap intake and would run out pretty nicely on top, too. Not saying custom or performance oriented grind wouldn't out do it, but if your needs are relatively simple and near the stock magnum 360 level, I wouldn't see risking overdoing it. These same cams move big heavy trucks with a good deal of proficiency, it would work pretty well for your Barracuda with A/C, and might even get some decent mileage doing it, too.