OK, now we're getting somewhere!  I have a Lister-Petter AC1 6.5hp 3600rpm 1 cylinder.  I have a Listeroid 12/1 on the way.  I'm comsidering a Mini-Petter.  One application I have will be a fixed mount, another will be as a moveable prime mover.  I'm looking at a PTO type connection, ie: quick connect/disconnect.  It will be used to drive a gen. head, then a welder, then a limb chipper, then an air compressor, then ? who knows.  This will most likely be the AC1 or the Mini-Petter.
  I'm aware of the belt type drive, but, I'm looking at alternatives to that.  I would rather stay away from U-Joints for the above reasons of weird torque reactions, if doable.  I was thinking of auto CV joints that can feed-through a couple hundred hp at all kinds of angles and do it smoothly without serious wear.  I'm also working on just how to tie the engine and driven unit together so that one doesn't flip the other.  Also, the CV joint is semi-enclosed, not open like a U-Joint and shouldn't beat everything to death if it fails, as long as you don't let it run on without shutting it down. 
  One possibility is to mount the engine into a Cushman Truckster I have and install a side or rear PTO that couild be used to drive the different units.  Hence the driveshaft idea.  We used to use the ribber/urethane spider tyoe couplings at work, but, they too will eat the spider if not aligned pretty well (not perfect, just well).  Although they are not out of the running by any means. 

Swedgmon, Firebrick:  The information you gave on the different types of CV Joints and other couplings is great. It gives me a direction to do more research. I saw a co-worker, 'maintenance supervisor', use a 1/2" cold chisel as a shaftshearkey to try to get a piece of equipment turning.  Still gives me shivers when I think about it.

I also am looking at adding an intermediary shaft with another set of flywheels to damp out pulsing to some degree.

 One thing I'm looking for here is maximum flexibility in power transfer to multiple driven units.  Running a semi-permanent mount generator with electric motors on each unit isn't out of the question, just exploring other possibilities.

  I'm looking at using my Listeroid as a changeable powerhead/prime mover.  I would need to be able to connect/disconnect the gen. head as needed, probably using a short stub shaft [6-12"??].  In my former work we used direct connections, but, when you're talking about 3 ph 480v 200hp 3400rpm motors you're talking about 2-5 ten thousandths allowable misalignment in all three dimensions and still using some type of flexible joint.  We used to use Ujoints, on 'close-coupled' to shafts up to 75 ft long.  I would rather stay from that degree of alignment every time I switched the drive.
  I was planning on setting up the engine to use a setup like a tractor PTO connection.  Also the engine won't neccesarily (??sp) be a fixed mount. 

  Hey guys check this thread out.  It's for RAW veggie oil, might be able to use lower temp for WVO.  Anyway, it's a university study of using preheated RVO in a Listeroid.  Sounds very promising.   

  I remember what some of the 'Old Folks' used to do.  In the '20s and '30s folks used to run the exhaust pipe to a barrel buried in the ground (wooden barrel) with the top even with ground level.  The exhaust went down in one side of the top and another pipe vented out the other side.  If you listened you could hear the the exhaust air gently whoosing out the vent pipe but nothing else from the exhaust.  Les