My tech had the same problem with rear calipers, he ended up breaking a one socket and 2 extension before getting it off. He ended up spraying it with some wd-40 or something similar and letting it sit while he finished up the other ones. Hopefully you have it on a lift as I'm sure it will help...good luck!
i would spray liquid wrench first and bang with a heavy hammer or the equivalent second to break the rust/corrosion. heating is secondary and always last resort, becasue i have seen instances where torching has expanded thread that bolts go in to.
2005 M. BENZ E55 AMG(Lifetime labor warranty(ME))
2006 M. BENZ R500 Saks 5TH AVE EDITION
A BUNCH OF BMWs(SOLD)
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