If your going to the trouble of fitting a C30SE why not try a source an Irmscher 4.0ltr version instead.

Quite a few for sale in Europe at the mo but very thin on the ground in the UK.

What ever you fit be it a 3.0 or a 4.0 make sure it has had uprate timing chains and guides as these were a weak point.
The ABS have had new heavy duty chains made but you will need to replace the chain giudes and sprokes which are more or less impossible to find these days

Oh and you might also have a problem with the wipers as i believe the motor fouls the cam cover

Cheers
Andy