Happy New Year to all.

This one has me scratching my head. I bought a O-200 for a project and want to disassemble it. One of the cylinder studs just spins. The nut is still on the stud and the stud spins easily with the nut, but the stud isn't coming out and won't seem to go in (clockwise, towards the crankcase) or pull out (counter clockwise) either - it's just loose.

Any thoughts or suggestions on how to get the nut off the stud (there's not much room) or get the stud out? Your help would be appreciated.