I have a Lone Star which weights about the same as an E-M. I used straps, chain fall and one friend to install mine.
But priobe did not like the strap suggestion that Tommy and Atlantacobra gave.
So the only thing to do is buy 2 cases of beer and invite a bunch on guys over. Put the body on before you give out the beer
Make sure everyone understands what you doing and how to do it. Go slow and keep everyone on the same page.
Dwight