The shifter would mount in the same place, but some shortening of the linkages would have to be done, as would a shortening of the driveshaft. [4" from what I remember]
I'm betting your Volvo buddy could handle the linkages [heck, you may have welding skills for all I know] but the driveshaft would need to be done by somebody to maintain balance. It isn't that expensive.
I have a 300D driveshaft over here if you need one to chop up. That way you could leave your 240D driveshaft intact just in case you ever needed it.
I'll be closely following this, and offer any and all help I can give.....
