Fix core voltage to 1.275 in the BIOS, and set the fsb to 266, disable Speedstep and anything resembling auto-anything. Set fan speed to maximum. Done. 3.466GHz. Should be possible even with the stock cooler (although it'll be running fast and may be a little loud). Monitor your temps just to check, and if it isn't stable bump the volage up a notch.
Gotta remember this is only bumping the fsb up to 266 - or stock for e7xxx chips, so doesn't put any real stress on the board or RAM, especially with no integrated GPU etc to worry about. Hell it's still comparable to running the e8600 and e8700 at stock, and as such doesn't really stress the cpu or cooling either. Should handle it no problem.