[bobcowan]

Your redline really depends on two components: Camshaft, and valve train.

Your engine has hydraulic roller lifters, and matching valve train components. Those lifters are good for just a hair over 6,000.

The camshaft has a specific power band, where it makes the best power. You want to shift gears as the engine is falling off the back side of the power curve, so as you up shift and step on the gas, you'll be making enough torque to push the car along. Continuing to run the rpm's up after the cam stops making power is often pointless.

You'll have to look at the cam specs and see what kind of power band you have.