Did 440 4bbl 375 horse motors get 6 pack rods?

I've rebuilt a few HP 440s in my time, and only one, a 1972 Polara CHP 440 4 bbl had 6bbl rods.
I watched an old YouTube vid today from Nick's garage and he said that "most" '70 375 horsepower E body 4bbl 440s get 6bbl rods.
What is your experience with B or E body factory 440's?
Did 70 or 71 4bbls get 6bbl rods?
Thanks for the info!
Scott