I don't have the time to read and study every word of your reply at this present time, but if you are referring to Full Size Chevrolet only and '55 to '64 only, I have swapped many Center Sections during the last 48 years as mentioned, it has been common knowledge amongst the Chevy crowd all through those years and, just to eliminate any doubt, I just broke out my Hollander Interchange, 38th Edition (a book that I know you respect) and it states:
Interchange #661, Carrier Assembly '55-'64 Passenger and Delivery.
No foot note of needing the change of Axles anywhere.
To further prove my point, I just looked up Axles and it states:
Interchange #651, Axle Shaft, '59-'64 Passenger and Delivery.
-Parting Out over 75 '58 to '73 Full Size Chevy Cars-
-National Impala Association
-Vintage Chevrolet Club of America
Last edited by 62BillT; 10-02-2018 at 12:44 PM.