First of all, i know the crazy sweeds have got the 603 in the 201 chassis before:
http://www.youtube.com/watch?v=j58QyrzfEEY
but i am wondering if it is a direct bolt on? Specifically motor mounts. I have a 2.5 190d 5-speed trans on the way (not sure model#) and a chance to get a running 86 300SD that 'smokes' for 1500. The 603 + this tranny would be the ultimate setup. In any 124 or 201. I have a rolling chassis i could swap it into now, but ultimately i would want it to be into an 040 124 wagon. Anyways, if anyone can enlighten me to the direct bolt on-edness of this swap let me know!
And you know that the SD chassis would be yours for the picking-apart!

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1993 2.6 (040) SportLinE 5-speed - Armed to the teeth w. roof rack/2x bike carriers/8x ski carriers/MB towing bumper
1993 2.6 (040) - deceased/reincarnated as a trailer.
1987 16v (702) - Now parting out(9/22/10)!!! - Email me your requests for 16v parts- Engine and full body kit avail!!
1987 300SDL (122)- For sale!