409 V-8 for Medium Duty Trucks?

[ClassicTVMan1981X]

While the 427 V-8 initially showed up to replace the 409 V-8 in the cars for 1966, but didn't it continue to exist for the medium-duty trucks through 1967 alongside the new 366 that took over from the 348?

The 409 would only have gone into the Series 80 tilt-cabs.

The medium-duty 427 with the taller deck and forged crankshaft didn't show up until 1968.

~Ben