Sorry.... I have unscrewed the nuts without any problems. The bolt itself is locked tight. I know that the shackles are threaded but I cannot for love nor money unscrew the bolts. There is no give in them at all. None. I reckon I am just going to angle grind them off and drill out the bolt.
Bolts on original leaf springs are locked. Won't give an inch. Any suggestions? Tried: oiling, heating, hammering, extra leaverage....
Next step, angle grinding the bolts and drilling.