I had the "wings" break off on one of my guide rod mounts so I opened the opening enough to get an open end wrench in there to hold the square nut. If you cut the bolt you will not be able to remove the end from the frame. Use some PB type stuff to loosen the rust on the bolt and nut, then loosen with the wrenches. Really man think before you cut!!

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If it ain't broke take it apart and find out why.

1983 300SD, 4 speed
1994 C280
1987 300TD wagon
1996 HD Road King

Ride in Peace Eric Peterson, Harley of Macon