No matter what brand of cam you choose for your 460, when you consider the flow charactarists and flow balance between the intake and exhaust ports, even on ported 460 heads, you should choose a cam that has between 6 and 12 degrees more duration on the exhaust than there is on the intake. As well, it's usually better to choose a cam with wider lobe seperations angles for 460's than would normally be chosen for other engines and install the cam 4 to 6 degrees advanced. This gives more exhuast flow earlier in the exhaust cycle and reduces overlap. Lots of overlap on an exhaust flow limited engine doesn't do a lot of good anyway, it simply costs some low end torque.