Well, SJS has made such and bit more, but he is not around here anymore, I guess. Anyway some pics here:
http://media.photobucket.com/image/340d ... 86.jpg?o=2
Motor he did use was Volvo Penta unit, 2.5l motor 16 valves, AQ151, AQ 171 or something like that, he used Megasquirt to control ignition (coil on plug) and fuel injection.
Of course it is easier to get B234 under the bonnet, but still it requires more work and I can't quite remember all of it, but I think sump fits, might need slight modification but such is probably not problem, however I'm not sure how that external oil pump fits into picture here, that might or might not cause some work.
Then you can move distributor from rear of cylinder head to cylinder block, like it is in 360, but sometimes you need to replace that intermediate shaft as some of those don't have gearing for distributor, but it should be possible to replace it from other motor which has one.
740&940 injection, now was it Jetronic or do I remember wrong?
Loom, ecu, sensors etc. needed, also air mass meter or whatever it uses.
Ignition needs bit of thinking, I don't know Jetronic, what kind of distributor it uses, would distributor from B200K work?
Ignition map is so much different in 16 valve motor that either programmable ignition or then original computer ignition from 16 valve motor is needed, also there might be need to do some work for ignition signal pickup, what Jetronic uses, not renix wheel?
I have no all the answers for this, but maybe some of this information helps you find answers, try find out how 740 16 valve Jetronic works, that helps a lot when thinking what you will need.