The newer style hydraulic roller cams are made for the street!!! With the faster ramp rates and other design changes you can lay off the duration and still get a lot of lift without having to run the high pressure springs...

Think you might want to find out a bit more about your engine... What is the part # of the pistons, and what cc are the heads--need to know this to determine where you CR is at now to determine the best course of action to get it lowered to a level you can live with on the street...