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

Orionsax7 said

So I am doing this same 5.9 magnum swap into a 65 valiant with power steering. Am leaning towards using the magnum manifolds. I have a manual box ready to go and I have the steering shaft out of the manual car as well. Should I just go with the manual shaft or use the power steering shaft with previously mentioned coupler? I figured the manual shaft would be the way to go?

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*Edit* this info is for 67+ only. Missed that you had a 65.

There’s really no difference between the manual and power shafts, other than how far they’re collapsed from the factory. All you have to do to get a “power” shaft to work with a manual box is pull the shaft out farther. It might take a little persuading as there are a few small plastic globs melted to the shaft to hold it in its factory location. To get a “manual” shaft to fit a power box, just knock the shaft back into the column a few inches. But if you completely take a manual shaft and a power shaft apart, the inner shafts are both the same length. Always blows my mind that people dish out the money for that adapter