727 shift point question, automatic valve body

I was reading about the part throttle valve before and was under the assumption that both 904 and 727 after about 1970 ish got this? Is that wrong? Thanks for the governor input. If this thing came from a c body with highway gears initially maybe that’s what dictated the heavier governor?

Just learning here

A&A seems to have governor kits, but which one would I need?