Pretty sure the A12 K member would be the same as any 440 B body K member in 1969. Have not heard of a special K member for these cars. I am sure sure some more knowledgeable A12 guys will chime in.

70 Road Runner 383-4 4 speed FJ5 & black guts
70 Charger R/T 440-4 4 speed FJ5 & white guts