I would like to only give some comment on the engine.
An 3.0 bore and a 2.0 stroke will give a much (to much) decreased compression ratio. Or will you use costum made pistons/rods ?
In the past I've made an 2.8 based on a 3.0 bore and 2.5 stroke. That brings CR down from 10.0 to 7.7. I however installed a turbocharger so it worked out well