- Feb 18, 2003
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if i were to rebuild my 4.6, how would i make it safely rev higher? i like the idea of redlining at 7k like the cobras. could i just buy a forged rotating assembly that can handle the higher RPMS? of course new valve springs and cams are needed. also, i would have to retune the factory computer to make the electronic cutoff higher than the stock 6025 redline, right? is all this possible? anyone done it?