One of the links you posted was previously posted by me in this same thread, and nopwhere in it does it say that the Dodge flywheel would work, One of them is a SAE size chart that falls into common knowledge category, And the other specifies that they used the following parts, none of them include a Dodge flywheel, and are not for a Spicer 3053, in any case.

FSO-6406A Trans-1.75" input

Gear Shift

SAE #2 Trans Bell Housing with Shift Forks

SAE #2 Flywheel Housing

Cummins 14" Flywheel

14" Pull Type, Single Disc Clutch

28MT Starter


I'm not sure how you use any of them as an example that what you are saying will work.