Dog,
I have a bore-scope you can borrow but I don't think you will see the cause of your problem. I had the same issue when my engine was on the stand and I panicked when it locked up. My problem was that the cam chain was bunched up inside the crankcase. When I turned the engine in reverse slightly and pulled on the chain, I felt the slack come off the inside of the crankcase and it rotated fine. I was relieved...
From your pictures, the right side (looking at the cam chains) tensioner is at the limit of its travel. Your chain is stretched or the sprockets have worn out. For example, look at the picture below and compare how much of the tensioner piston is showing to your tensioner.
I think the left side looks OK. If you remove the right side cam, rockers, rocker shafts, and cam tower; then you are only out the cost of an o-ring and a gasket. Then you will be able to determine the reason for the fully extended cam chain tensioner. And, you may find that your engine is locked because of the valve train on the right side and not something inside the engine. Have you changed your cam timing accidentally or on purpose?
Having said all that, you may want the bore-scope on Ebay. I find uses for mine all the time, you may want your own.
PM me if you want to borrow my scope.
Good luck,
Mark