Here is my thought,

THe block of the 2.5 turbo is the same as the block of the 2.5 non-turbo as far as length and mounting position. The tranny from the 2.5 5 speed should just bolt to the turbo. Thus, the drive shaft from the 2.5 5 speed should be the right length for the 2.5 turbo engine.

The rest of the clutch components are easy, as the body is already configured to receive clutch components in the cabin.

I am 99% certain the set-up is mechanically possible. I do not know the performance and feel of a turbo with a 5 speed in a diesel. I would love to find out.

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Jovan

'84 (11/83) 190D 2.2 5-Speed; Silver/Blue; Motor No. 00354, 402k mi (340+kmi mine)

'89 Porsche 911 Turbo Coupe; Black/Black; 53kmi
'05 BMW 530i 6-Speed; 302kmi
'19 Range Rover; 30kmi