72-73 e-body 340 exhaust manifolds numbers

looking for a set of 72-73 340 e-body exhaust manifolds,what are the correct part/casting numbers?

Casting number for RH is 3418623. Not sure about the LH.

Here are a picture of mine. I will see what the passenger side says when I am at my shop today, it is on the back side of the manifold.

Originals from my 73 340 Challenger read-

Driver side 3751084
Passenger side 3418623

Here are the 71-74 B/E 340/360 manifolds. 70E used A body manifolds.

Do you have a pic of the drivers side?

71-2 B/E used a different drivers manifold than A body.

thanks

keep seeing 318 manifolds for sale as 340s

Ya I do too. Much smaller ports and have a flat flange.

found a nice set with close date codes thanks for the help

Here ya' go

IIRC, the 621 manifold was used through 72 and the 3751084 was used in 73

Ok good to know. Looks like the front rib is longer on the 084.