Dual plane all the way. I made the same mistake almost 10 years ago.

Roadrunner, mild (emphasis on mild) 440 with a torque cam. Cast iron intake, exhaust manifolds, and a holley dp carb.

I switched to a 750 edlebrock (sold the holley) and when to a Mopar M1 single plane high rise manifold.

It never ran the same again. No low end torque, killed drivability. My embarassing 15 second quarter mile decreased to an even more embarassing 17. It was quite a learning experience. Go with a dual plane.

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