On Fri, 08 Sep 2006 10:15:42 -0700, jamesgangnc wrote:

Heat the block around the bolt and hammer on the head. Not so much
hammering that you damage it but enough to break loose the rust some.
If you have to dril it out start with a small bit and try to get as
exactly in the middle and drill as straight as possible. Then work up
the drill bits sizes.

I'm surprised nobody has mentioned an impact wrench. Pneumatic is nice,
but not necessary. There are manual impact wrenches.

http://www.mysimon.com/Tools-and-Har...mlpid=31740648