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I've done a lot of stuff with a torch that might make some people grimace. Oh well. I removed a pair of 5/8" drawbar housing bolts from the axle center housing of my 7710 once that were rather back to nature. I did the same as you. Drilled, then tried the cheap Proto easy out. Didn't move. Didn't have time to wait for penetrating oil or patience either. I drilled fully through the length of the bolts, as large as I could without disturbing the threads. I could see the bottom of the hole in the housing. Then, I used a #3 welding tip (not a cutting tip) on the torch, and heated the remainder of the bolt until it glowed cherry red. Keep in mind that the bolt, being a rather small piece, will heat much quicker than the surronding housing. You want to keep the flame carefully directed, and heat the bolt only. Do not cool. Once red, in with the easy out, quickly, and the bolt will come out. You will sacrifice the easy out, but they're cheap anyway. Then I just run the threads clean with a tap after it cools, and done. Not saying anything against the other suggestions; just that this worked for me. Good luck. Rod
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