More exhaust manifolds

DionR said
Not sure how this will work but here is a link. Show's the interchange for the manifolds and the 72-73 DS 340 manifold interchanges with the 74 DS 360 manifold.

The fact that the casting number is the same is enough for me. I could see the same casting number on different parts if they were machined different after they were cast (e.g. 340 TA heads where J castings with special machining for pushrod holes), but there isn't any machining related to the outlet. So, if the casting number match and it has a flat flange, it is an HP manifold.

Might be worth changing the terminology to "flat flange" rather than "340". The 360 in '74 Dusters and Dart Sports had a flat flange HP manifold on the driver side.

GREAT LINK DionR!!! Unfortunately most 383/440 manifolds are also flat flange manifolds so without the "340" in front of the "flat flange" no one would know which manifold you're talking about. The 340 manifold was made from the mid/late 60s till '73 for the 340 engine after that it was only used for very years on other SB engines. For this reason the great majority of these HP manifolds are 340 driver's manifolds.
But it is nice to know that these manifolds were used on engines other than the 340 (for the history books)!! Thanks,

Treblig