If I Were To Install The Stage 2 Comp Cam With 1.9:1 Ratio Rockers Would I Have Any Problems With Lift Clearance Or Would I Have To Revert To A Lower Ratio?

Yes. Fitting our 1.9:1 high ratio rockers with the Comp Cams stage 2 cam will create more total valve lift then the standard heads can handle.  We would either recommend that you revert back to the standard ratio rockers or alternately you can machine the valve guides and fit the correct valve springs to suit the increased lift.

Note: For example, the standard Ecotec heads can handle a maximum of .515" valve lift before you run into clearance issues with the valve stem seals.