Factory manifold casting numbers

[340 Dart]

I found a set of manifolds recently and I need to identify them.
The number on one is 3330204-3 4-5-78
The other one is 4041471 1-12-78

Can anyone tell me if these are 360 castings or 318?

 

[340 Dart]

Bump:fart:

 

[AdamR]

I dont see those casting numbers listed any were.