School me on 340 exhaust manifolds

This is exactly why one size don't fit all! If he wants all original that's great! Everyone has their own opinion so let him do as he pleases.He is asking for help finding parts,I'm sure he has had plenty of opinions. Sorry that I don't have the date code you are looking for but good luck finding them.


still not sure what date code I'm looking for actually.

June-aug 1969?????
OR
June-Aug 1970????

fender tag says oct 10...how do I find out what year? yes the car is registered as 1970 duster

Thanks for everyones help so far