Verifying a 426 wedge

mcodecuda said
It would be stamped A 426 HP for a 65. 64 would be
stamped V 426 HP.

I had a B426 block sitting in my shop for a number of years. I was told that the C body cars got a 426W for a short time in 1966 but that doesn't seem to be common knowledge so I guess I'm not sure where it came from.