You know that 440 motors weren't available in production A body until 1969, correct?
Which means that those manifolds may be 383 and not 440
Look at the casting numbers and casting dates on them to see what they came on originally, I have heard of some guys using some of the early C body manifolds to put a 440 in some of the early A bodies
I bought a set of 1967 383 A body manifolds for my 1969 Dart GTS H code 4 speed car several years back to get rid of the low hanging Hooker fenderwell headers. I may be in the market for a set of 1969 383 exhaust manifolds, cash or trade