More information is needed to answer the question you have asked. You can Rev a motor beyond its maximum HP range and it will drop off in HP but still gain in RPM. My Race Hemi 430 CI was shifted at 9000 RPM, through the traps at 9900 RPM, making power. Good equipment is a must and good heads and cam and exhaust and intake is also a must. A 440 needs the same things, still a stock 440 motor is good to 5500 to 6400 RPM for making power depending on what 440 motor. The 440 bottom end has the same basic mathematics as a Hemi so you choice via you parts how high it can Rev.