does your lights even come on?? cus id say maybe you have crossed some wires that go to your killswitch.. qiuck fix thou.. dont turn on your lights..lol
if stock cyls should be easy use your fingers.. and on stock cyls there is a small bevel on bottom of the sleeves... not sure bout cubs thou.. if you got them..
if there trash maybe you could weld a nut to the top .. give you something to grab.. and get some pb blaster spray let it soak a lil.. if that fails myabe heat the stud with propane bottle just don't get it too hott and screw up your cyls..