You'll do that until you "run out of brakes" when they overheat. I turn mine off when the rpms get too high, slow the vehicle down with the brakes and then turn the tow back on. That way you can use the engine and keep your brakes from overheating without "red lining". Glad you like the 6 Spd. This is my third Ford V-10 (first 6 Spd) and I have really like the engine thru 60,000 miles +.
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