Stock Intake manifold with dual Dutra

Don't know. The intake manifold is not open to the exhaust. They only bolt together so that the intake can get manifold heat from the exhaust.

Also, I don't know what mods, if any will be needed to get them to fit together. For example, with my Offenhauser four barrel intake, I had to grind a little off the parting line on each runner of the exhaust manifold so they would fit together. You may need to do something similar, I don't know.

I do know that when Doug was selling them, they were not completely machined. You needed to do some final fitting and grinding on the runner flanges so they would fit properly on most anything. Now that Aussie is selling them, they are supposedly a more finished product, although it does say on the Aussie site that final fitting and grinding may be needed.

It's probably something you're just going to have to see about when you get everything in one spot.