The RAAF C130A's where the last of the transport versions produced and were followed down the line by the RC130A's which if I recall were eighteen.
The had a hole cut in the cargo floor and cameras that ran back and forth in rails.
When they were no longer needed they too were converted to transport floors.
The C130B was an improved aircraft and had the following improvements.
Long range flight deck with two bunks
A crew galley
Increased wing tanks which did away with the A model pylons.
Four bladed Hamilton standard props which greatly reduced noise but at low level a slight decrease in performance.
GTC doors which could be opened from flight deck, which allowed use on the ground without the LM getting out an opening the doors.
Slight increase in engine HP
Increase in AUW which called for beefed up landing gear.
Generally an all round improvement particularly in long range tasks.
In hindsite would have suited us better but that is all history.
Regards
Col