Lucky B%·%·&/ !
I think, from measurements only, that the transfer box flanges can be made to come out at the same position as the original engine. It also looks like the top of the engine will be comfortably within the engine cover.
My engine is a Disco one, rather than a defender, and I think I need to fabricate a new manifold and turbo charger mounting - is that your reckoning too ?
STeve