OK I GOT SOME PHOTOS!
0: The inner diameter of the bicycle's cylindrical shell (into which the pedal shaft fits and rotates) is 47 mm.
1 & 2: These are photos of the replacement pedal shaft with its associated parts
3: This a photo of the original huffy pedal shaft with its associated parts
4: This is a photo of the cylindrical shell (into which the pedal shaft inserts and rotates), showing the original bearing inserted in its original position in which the original pedal shaft fit and rotated.
5: This is the replacement pedal shaft showing its diameter to be 16 mm
6: This is the replacement pedal shaft inserted into the bicycle's cylindrical shell (in which the pedal shaft rotates). This replacement pedal shaft has an extended length so that the pedals will not impact the engine.
Thanks, will have to sit down later and match this up with the measurements based in these photos later, thanks so much.