What carb and intake for 5.9 Magnum?

It will be very interesting to see how our two builds compare. I'll be following your thread. Of course you're way ahead and my progress will be slow.

http://www.popularhotrodding.com/te...gap_performer_intake_manifold_tech/index.html

This article reads like an ad for Edlebrock which it likely is, but its the best I could find providing some hard data for intake performance. It's fairly informative about intake design. It did not however, allow me to determine whether the plain performer, the performer rpm, or an air gap version would be preferred. I'll have to research some more.

The Weiand stealth seems very comparable but I have found no solid comparison data.

It would seem that your M1 (single plane right?) may produce a little better high rpm power and give up a little torque at lower rpm.