More exhaust manifolds

DionR said

Sorry, I wasn't really asking a question about the difference between the driver's side manifolds. I do feel more educated in that I can see why some with early A-Bodies would say that a 340 driver's side manifold works and other don't. I'm clear on all that, and didn't know the later one was "shorter", so thanks.

Only question I have is - are you saying that both manifolds in the first picture in post #47 have large outlets? Or to state it a different way, do you agree that the seller in the link is correct that the driver's side manifold he was selling had a 2 1/4" outlet?

Click to expand...

The pics in post #47 show a 60s 340 driver and a 70s 340 driver and they both have the large 2 1/4" exit hole. They flow the same but the 60s manifold is sleeker, less bulky and has more clearance around the steering shaft area. As far the seller in the link....the driver's 340 manifold is the large hole (2 1/4" outlet). If it has those ribs above and below the front part of the manifold and it has a flat flange it's probably a large hole 340 driver (70s). But please remember that Mopar also made some small hole (1 7/8") 340 driver manifolds (they are shaped differently). The reason I say this is that if the seller won't show pics of the actual size of the exit hole do not buy the manifolds. Just because it's advertised as a 340 driver or a 340 passenger does not mean that it has a 2 1/4" exit hole.

Here's a pic of a 360 magnum I just finished machining today, well over 2 1/4". There's no doubt about the size of the exit hole!!

Thanks for the questions, I hope it helped other members in getting the manifolds they want/need.

Treblig