Car- 1974 duster power steering non A/C, Engine-340 block with 360 magnum heads auto trans I want to find a set of manifolds in a junk yard, what ones do I want off of what car? what will work the best?
I would say a-body 340 manifolds off of the '68 to '70 if you can find them.
They aren't cheap if you can even find them in the junk yard on a car still.
If you find some, grab whatever 340 stuff that's there too including the car body, engine, trans, and rear end!
I have a '67 cuda with a 360. I put '93 dodge Dakota manifold "2 1/4 outlet" $35 on the passenger side and a 340 manifold $140 on ebay on the driverside. They both bolt on and flow great.