Intake manifold selection

Ok, I have narrowed down my engine build to be a very mild 289 with good torque since this will be a street car only. 64 Fairlane 4 door 3.00 gears, C4.

Pretty sure I will stick with the "J code" heads I picked up, C8OE-F from a 68 Cougar 302 4V.

Cam: Either Comp XE250H or (more likely) XE256H.

Carb: Probably a Performer 600 also considering a Road Demon Jr. 525 or a Performer 500. Opinions?

289 HiPo Manifolds, duals with H pipe.

Would this combo work best with a Performer 289, Performer RPM, or Stealth Manifold?

Also, with the C8OE heads and small cam, am I good enough with the stock rocker arms or would I see a benefit by using something like the Comp Magnums?