Posted this over in the Eco Owners Forum, but thought I would try here since everyone seems to of moved here anyway.
For those that have installed their own springs on the 2013 SHO. I'm assuming you used an impact gun to remove the two strut bolts (strut to spindle bolts) out? A 3 foot breaker bar couldn't break them free. The nut came off without a problems, but the bolt didn't want to budge.