In the past I have clamped the engine to the engine mounts and made sure everything looks reasonably straight and drilled and bolted the engine to the engine mounts.

To date it seems to have worked well but surely there must be a way of making sure the alignment of the engine to the engine mounts and fuselage are absolutely spot on.

Can someone please point me to an article on the web regarding this or give me there ideas on how they do it.

Thanks