Hi Jon21947,
This is a situation most dreaded by mechanics.
Since you have used a blow torch to heat it up, get a can of good rust penetrant and let it soak through before trying to unloosen.
Wurth has a rust penetrant that works very well for such situations.
Good luck, you would need plenty iof it. If all fails, you would have to use a sharp chisel to break the nut.
As to the calipers, a knuckle assy from the scrap yard would be the best option.
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Thursday, August 20th, 2009 AT 2:18 PM