[Brian]

By all means; if you can get them out by the double nut method, use that method. At least the removed studs may be fit for further service, unlike the visegrip method, which will bugger them...
The last one I did [two days ago], I needed to resort to visegrips and heat along with penetrant. Main thing is, once you get them to move, keep up a forward/backward motion to free up the threads, don't just unscrew them directly. Good luck