[RET_COP]

If you use the expensive hydraulic roller lifters you can use high spring pressures and with no bleed down and Rev easily to high 6000s if your combination requires it. You will pay but you get results. Most engine combinations. Don't need them . Also having your rocker tip in the middle of the valve stem is not the indicator for good geometry. You can be centered and way off causing undue loading and stress, which can lead to worn parts are breakage. The valve train seems to be the least understood and most overlooked area in the motor which cost horsepower and worn parts.
Why did something break,!? I would not piecemeal a valvetrain.