I already have a nice cam in the engine and am looking for ways to get that little extra horsepower out of the engine. If I did change the cam how effective would going to a roller cam and lifters be? The current cam is Comp cam Grind number XE262H-10 . The cam was degreed at 104 degrees intake center. The heads on the engine are cast # 14014416 with intake valves at 1.85 exhaust 1.5 the cc is either 62cc or 58cc I'm not sure which and have no idea how to tell which. The carb is an edlebrock 600cfm. #1406.