While some company manufacture a turbo for 240d and 300d non turbo engines the critical factor is that non turbo engines have no oil jets to cool the pistons. If you do add a turbo you have to keep the boost so low it is almost pointless. If you’re putting a turbo engine in a non turbo car use the turbo transmission If you dont you run into all kinds of connection issues I am sure of this because I am putting a turbo transmission in a non turbo car what a pain about the only thing that is the same is the bolt pattern from the bellhousing to the block.
Dave S