Frank,
Look at the picture that DavidG posted above, now read his post. He has clearly pointed out what you should do next. Remove the timing gear inspection cover (2 bolts shown in the picture and one under the cover that goes through the oil pan). After removing the 3 bolts and timing gear inspections cover, you can now crank the engine over a few spins and check the teeth on the timing gear. Very straight-forward procedure. Good luck!
Frank, Like DavidG said earlier...."My bad, there are 6 bolts" I too forgot the front bolts on the timing cover. Anyway, you found them. The gear cover should come loose. Perhaps there is a little gasket/gasket goop holding it on. I replaced the timing gear on my Model B motor several years ago (with the help of a Model A owner). You're going to get this thing...hang in there! Regards, Pat
Will look into the spark plug holes before I began trying to take timing gear cover off. I took at easy bolts out... no problem...but will try to see valve motion before I continue...Spark plugs are right over the valves. Easy to see if things are happening there. That's a good suggestion. With engine turning over by starter if you do not see valves opening and closing, you can surmise that the cam gear is dentally challenged. Or worse, but that was the reason for the fiber gear. A weak link that preserves other more important things from getting broke. Plus they're quieter.
I tried to see the valves....Can't
I think I would need something like this
http://www.harborfreight.com/digital-inspection-camera-67979.html
I seemed to remember a long time ago that there was a fiber optic scope that did not transfer the image to video but was a direct view and sold for
much less. Today everything gas to electro-optical.
Not really needed here.