And balance everything to within a knats wing on weight!!! Little inch motors will make power but you have to zing them. A quality balance job is critical to longevity on them.... As NTF said, engines are a bit tough on valve springs when they run high (6500 and up) RPM, so plan on some extra maintenance keeping an eye on valve spring tension. Solid lifters seem to cause higher wear rates on the springs then hydraulic cams, roller cams with the radical ramps slam the valves even harder so the valve springs tend to lose tension and or break more frequently. Valve clearance is critical for perfomance and longevity also, follow the cam makers recomendation and check them frequently.... Oh yeah, run a rev limiter for insurance on missed shifts....