> Anyone know how these bolts could be removed from the block....I remember
> some tool my dad use to use for this sort of thing by drilling in the
> center of the broken bolt and screwing into it at "tap type" device that
> you turn counter clockwise.....

I've never had to deal with broken alternator mounting bolts but here are
some considerations:

The tools you're talking about are called "Easy Outs".

I wouldn't attempt to drill into a bolt that's in an aluminum block without
using a drill guide ... even a homemade one using hard metal so the drill
bit won't wander.  I'd start with a small hole (pilot hole) and enlarge it.
If the bolts are slightly proud of the surface, I'd try grinding them flat
to reduce wander.

I'm not a mechanic .... but I did stay at a Holiday Inn Express last night.
; )

Mike