The card should list such specifications as intake and exhaust valve opening and closing degrees, cam lobe lift, valve lift, etc. The "298" part of the cam number might be the valve open duration in degrees of crankshaft rotation, which would be a pretty radical cam to run on the street. Most "stock" cams will have duration numbers somewhere in the 250 to 270 degree range. A 300 or more degree cam will have low intake manifold vacuum, a choppy idle, and very low torque at low RPM. There will be lots of horsepower at high speed near full throttle, but the low speed performance will "inhale vigorously"! Long duration cams also need a high static compression ratio, big valves and ports, and a free-flowing exhaust system.
Jerry
