HELP!!! Manifolds???Huggers???orHeaders

Here is a Mopar muscle Magazine exhaust dyno comparison on a mild 360 which might help in your selection:

http://moparmuscle.automotive.com/30496/mopp-0307-mopar-crate-engine-exhaust/index.html

The last photo link at the bottom of the article has the dyno numbers from each set-up.

You don't want to go too big. But I have the TTI 1 5/8"-1 3/4" step headers on my race car and they work great even in that race-only combo!