[Dangerous Doug]

Unless you're a structural engineer and calculate the size and type of timber required for the span and weight you're working with, don't do it. One of three things will happen: you'll get lucky; you'll get killed; or, you'll damage your engine.

Get a cherry picker. It will also allow you to move the engine around as needed as you put it into place.

I also used an engine leveler, which made the weight shift a lot easier. In fact, get an air rachet to use with the engine leveler, which is much easier than a manual rachet.

DD