YES 5.9 Magnum manifolds work in early A bodies. Here is exactly how!

dartfreak75 said

I'm going to try this In my 75 dart. What down pipes are you using? Did you have to make them or will any abody down pipe fit? Sorry if this had already been covered.

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This was custom made while the engine and the 340 exhaust manifold was installed on the driver's side. I used a section of mandrel bent J pipe but it's actually better to use a mandrel bent 2 1/4" donut. The passenger's side (JGC) is a piece of cake for anyone. This was in a '69 Barracuda (318).