You can remove the complete Arm where it bolts to the Block.
In our DIY section some have Drilled out the stripped Bolt head.
I have not read of the Motor Mounts sticking like you say. Is there any Engine Shock Absorbers still attached yet?
DIY Repair Links
http://www.peachparts.com/shopforum/diy-links-parts-category/
http://www.peachparts.com/Wikka/DoItYourSelf