School me on 340 exhaust manifolds

That's a pretty course response to those trying to help you.

FWIW, if you do not have the original manifolds that came on the car from the production line, then it's not original.

Numbers matching pertains to parts with numbers corrisponding to dates and other parts codes specific to a car built in a specific year

Would it not be true that if someone bought a 1970 340 duster NEW and one manifold came cracked from the factory, and he got it replaced right away with another one with simular date code ( unknown to him) then he stored the car for decades...passed away...wife sold the car..would the buyer be able to tell that the car was not 100% numbers matching???

Sorry bad sport if you think that's a harsh comment towards people who you think is trying to help me...I don't see how any words on the post was helping me understand what year manifolds I was looking for. It was just an expression of opinion.

What if someone kid smashed the dome light on said vehicle? The owner replaced it...would it still be numbers matching?