"I want to say a 1 ton flywheel/ clutch had a different bolt pattern (flywheel to pressure plate) than 1/2 ton."

49Neo,

That is correct for all/many years (clutch sizes).
That is shown at the links for truck clutches that I posted above.
It is shown here for 1949 trucks.


"I believe the 1 ton flywheel was thicker, too."

It would be interesting to know if the thickness of the flywheel is different. That is possible as far as installation is concerned.