Once the engine is well broken in. It is capable of above 8,000 Rpm's. Normal driving you should be shifting between 4-6,000 Rpm's. If you are planning to attempt to drive the car at higher Rpms for more than quick spirts you should install an oil temperature gauge. Anytime you are running the engine above 4,500 Rpm you will be running the risk of oil temperature increasing due to the added friction and strain on the engine as well as how well it is tuned to run at those Rpm's. If you are running lean at higher Rpm's it can cause excessive combustion chamber temperatures which will cause the oil temp to rise as well as have a good chance to detonate the engine. Any excessive amount of oil temperature or detonation can cause to go bad.
So as a general rule when driving the car normally you should shift between 3,500-4,500 Rpm's with occational short bursts up to 5000-5500 rpms. If you intend to exceed that Rpm than I would recommend an oil temperature gauge and exhaust temperature gauge to monitor for high temperatures and lean or rich conditions.