Jim Thomas wrote:

  I’m looking for a bent or broken engine mount for an IO-550 from a LIV or
  a Legacy that can be straightened and used for storing then assembling an
  engine (firewall forward) prior to installing the engine on an airframe.
  I would appreciate anyone having one or knowing the whereabouts of such an
  engine mount contacting me via email.

Jim,
Don't know your exact situation, but rather than build the firewall forward
on a dummy engine mount, you might consider mounting the engine to the
regular engine mount, then making a "fake" firewall out of Plexiglas or
other material. Mark and cut all the holes in the fake firewall, including
those for the engine mount. You can also add marks for anything behind the
firewall such as reinforcing ribs, etc that you want to avoid. Then build up
the engine compartment and mount everything to the plastic firewall except
the engine control cables. If your installation is average, you'll clamp a
number of things to the engine mount tubes during this process. When all is
done, carefully detach everything from the plastic and reattach the whole
buildup to the real firewall. This works for almost everything except the
control cables, and perhaps the magneto ground wires, etc, that you don't
want a break/connection in. I've used this method on two experimentals to
date and it works for me...

Bob Pastusek