Sounds like a lot of corrosion on the nuts!
Don't feel like cold chiselling mine
Thanks for your help advice but you did not say what the difference the ride height and stability was after fitting.
the ride is less wallowy ( if thats a word ) and more stable on roundabouts or when your passing trucks, and generally smoother.
with regard to the cold chisel, think i have not described it well.... the whole bump stop is screwed into the top chassis there are no nuts to go rusty or corrode .. see picture below.. you either need an extremely large grips or a special tool or a cold chisel on the edge.. in the groove that is there to wind them in or out.
one or two hard taps is enough to lose them off and screw out by hand.