"relieving the exhaust bridge"..."i want as smooth a power band as possible"..."should this be a good setup for a smooth power band"....???
Really these are questions 'Best' answered by the person/shop doing the build. While you will get answers here, they won't reflect what your builder is doing, and the end results from his work.
I suggest you call your Builder, tell him what you want & expect back on your build, and ask all the questions you need answered...that will give you a direct connection to your parts, build and builder.