Making a 11" flywheel work on an A body...

How about the vans/ pickups that used the A833 OD? Did they use 11" wheels

Nope, same 10.5" clutch as the cars an it was only the light duty D100/A100's that got the A833OD. The only small block engines that got the 11" clutch were the pickups with the new process truck tranny.