Exhaust Manifold options for a 5.9 magnum and 64 dart

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DumpsterFire

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I've looked at the thread about using magnum manifolds and while tempting looks like it's by no means a clean and easy fit. I ain't chasing no power but 340 manifolds look like the most reasonable thing to use. No power steering on this car
 
There are some mismatch issues between the 340 manifolds and magnum heads. A thread or two on here discusses that.
 
340 manifolds aren't exactly a clean fit in the early A body either, although they take less work than the Magnum manifolds. And then there's the port mismatch/sealing issues and outlet to head interference to deal with. And the cost.
Magnum Heads On 340
Easiest (and since you're admittedly not chasing HP) would be the '64-'66 A body 273 manifolds, that would only have minor interference issues on some (maybe not all) Magnum heads- nothing a SLIGHT touch of grinding on the head and a reasonably thick exhaust gasket won't solve. The ports match up better and the flow restriction won't be as noticeable (if at all) on a stock or mild engine. And the best part is they clear everything (steering column and collar, coupler, linkages, etc.) as is.
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Passenger side doesn't seem to be an issue with just about any manifold (other than the port mismatch of the 340/360 manifolds).
 
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X 2 on the Early A manifolds as best option. Do the fitting on an engine stand so you can make the drivers side fit well before sticking the motor in the car. The interference point is right below the # 7 cylinder port. Passenger side will fit fine, so only the drivers side needs some help. Good thing about the Magnum heads is, all of the exhaust bolt holes are dry, unlike the end holes of LA heads. Good luck with it.

:thumbsup:
 
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